hydraulic pressure switch symbol

How Hydraulic Pressure Switches Work. 3.61.1 Plain orifice, unconnectable 3.6.2 Connectable orifice (e.g. Station, Testing, Measurement or Power Take-Off . 0000001588 00000 n 0000006298 00000 n ˀӑ> �ݳ��\o8�O��ᆬ��ީz:�@ 2- PRESSURE RELIEF VALVE Is used to set the maximum working pressure of the hydraulic system, and therefore the capacity of the lift. Pressure Switch Characteristics / Ordering Code Series PSB The electro-hydraulic pressure switch provides an electric signal when the sensed pressure goes above or below the selected setting. Hydraulic Pressure Switch Instruction Manual SFA Companies 10939 N. Pomona Ave. Kansas City, MO 64153 Tel: 888-332-6419 * Fax: 816-891-6599 E-mail: sales@bvahydraulics.com Website: www.bvahydraulics.com This is the safety alert symbol. The sensor elements are mostly applied on a welded stainless steel diaphragm, are produced using thick-film technology (screen-printing process) and are temperature-compensated. Line, Working ( Main ) Line, Pilot (For Control) Line, Enclosure Outline . 0000020544 00000 n e]�! 0000044239 00000 n wGW�lL��j�u��^pç�12<. The basic valve symbol is a square which represents thebypassed from points of high pressure to points of low pressure The combination of flow and pressure required by a hydraulic system determine the operating horsepower (HP). The dark upper triangle in these hydraulic symbols indicates fluid going out of the system and hence represents a pump. In this schematic symbol, the pressurized fluid is on the top side of the valve. Pressure switch symbol ISO 4400 connector 1 P 1 2 2 3 3 Supply Pin 1 Normally closed Pin 2 Normally open Pin 3 March 1996 GB-2166A S*307 Series ... switch will reset when the hydraulic pressure falls by a small differential. 0000005635 00000 n 0000038934 00000 n Switch-off valve – externally controlled. Pressure Switches 2 Warrendale, PA USA Phone 724-776-5577 Fax 724-776-0310 8/98 Norgren and Herion have joined forces to create one of the largest manufacturers of pressure control instruments in the world. Line, Flexible . 0000041043 00000 n the pump. Pressure reducing valve symbols look very similar to those for pressure relief valves. 0000002851 00000 n Pressure booster single-acting, which converts a pneumatic pressure p1 into a higher hydraulic pressure p2 6.3.15 Double-acting cylinder with double-ended piston rod of different diameters, with adjustable end position cushioning at both ends Line with Fixed Restriction . 0000036835 00000 n First of one must look into the manual of supplied components, which symbols … The basic valve symbol is a square which represents thebypassed from points of high pressure to points of low pressure valve body or spoolspool. Pressure Switches. R�t�˴9��*XgB�Rs��|*2��|c�Ť] Pressure switches are used in various applications that require an adjustable, pressure-actuated electrical switch to make or break an electrical circuit at a predetermined pressure. Function The spring loaded piston is hydraulically dampened. The symbols are designed to make it easy to understand the most of hydraulic and pneumatic components. Automation brands ; Avatars; Basic Network; Brands Logo; Brands 0 - 9; Brands AA - AO; Brands AP - AZ; Brands BA - BZ; Brands CA - CL; Brands CM - CZ; Brands DA - DZ; Brands EA - EZ; Brands FA - FZ; Brands … 0000004171 00000 n The unit is composed of two sections—the transducer unit and the switch unit. They are generally used if an electrical switching command or status signal should be issued when a set (pre-selected) pressure value is reached and exceeded, to trigger an immediately following work cycle (actuation of an electromagnetic directional valve) or to end a cycle sequence (deactivation of the pump motor, neutral position of an electromagnetic directional valve). Ashcroft ® pressure switches are provided in a variety of configurations to meet most installation requirements in nearly every industry. Enables the oil flow to a further consumer as soon as the pressure at the first consumer has reached a set value (control valve). DENISON HYDRAULICS Pressure Switch Series PS. hydraulic pressure to the landing gear and flap systems. This is achieved by pressing the AUX PUMP switch (GEAR/ HYD panel). Symbols have been developed to represent most of the available fluid power components. Because most units are very small, the displacement of the unit is factored into the measurement. The following pages go through all standard ISO symbol information as it applies to hydraulic and pneumatic schematics. Manual activation of the valve during flight is accom-plished by depressing the alternate-action push button HYD XFLOW switch (GEAR/HYD panel) which connects the landing … Hydraulic Symbols. trailer << /Size 161 /Info 98 0 R /Encrypt 102 0 R /Root 101 0 R /Prev 923842 /ID[<00c665a3017dde878f8f5f0da81cc9b0><4086b6da86ed8ef36039a7e098e15d81>] >> startxref 0 %%EOF 101 0 obj << /Type /Catalog /Pages 97 0 R /Metadata 99 0 R /PageLabels 96 0 R /PageMode /UseThumbs /PageLayout /SinglePage /OpenAction 103 0 R /AcroForm 104 0 R >> endobj 102 0 obj << /Filter /Standard /R 2 /O (��Jٮ� Ӛ��~"�W��Ϲ��ߊ��) /U (=m��JG!�m�Z�V2I��?q�䞖�t) /P -28 /V 1 /Length 40 >> endobj 103 0 obj << /S /GoTo /D [ 105 0 R /Fit ] >> endobj 104 0 obj << /Fields [ 93 0 R 94 0 R ] /DR << /Font << /ZaDb 91 0 R /Helv 92 0 R /HeBo 111 0 R >> /Encoding << /PDFDocEncoding 112 0 R >> >> /DA (��e��~3ަ-ή�) >> endobj 159 0 obj << /S 460 /V 674 /L 722 /Filter /FlateDecode /Length 160 0 R >> stream Figure 5-10 shows a pressure switch. 7. 2 … 0000011194 00000 n Direction of Flow - Hydraulic : Direction of Flow - Pneumatic : Lines Crossing : Lines Joining . 0000035335 00000 n Pressure Control Symbols Hydraulic pressure is controlled through the use of valves valves that open and close at different times to allow fluid to be bypassed from points of high pressure to points of low pressure. The bottom symbol shows a hydraulically operated valve, but in this case, flow can only pass in one direction because the spring chamber is connected to the low pressure, return line connection. 0000001977 00000 n 0000017127 00000 n To initiate the hydraulic cross flow function, the auxiliary hydraulic pump must be running. 0000001769 00000 n Obey all safety messages that follow this symbol to avoid possible injury or death.! Draw the ladder logic representation of a limit switch consisting of a mechanically interlocked pair of NC and NO contacts. 0000040994 00000 n HAWE Hydraulik SEEinsteinring 17 85609 Aschheim/MünchenGermanyPhone: +49 89 379100-1000Fax: +49 89 379100-91000info (at) hawe.de. i� ��IƘ[� Every system must have a relief valve to protect hydraulic and mechanical components. Draw the schematic symbol for a drum or cam switch used to reverse the rotational direction of an industrial 3 phase AC motor. 0000035393 00000 n 0863212000000000. 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A pressure-sensing element is that part of a pressure switch that moves due to the change in pressure. 0000003397 00000 n 0000015310 00000 n Hydraulic symbols are issued and controlled by The International Standards Organization (ISO), standard ISO 1219-1:2012. Pressure Control Symbols Hydraulic pressure is controlled through the use of valves valves that open and close at different times to allow fluid to be bypassed from points of high pressure to points of low pressure. 16 SE 5 Switch for charging accumulator 39 Extra hydraulic outlet 17 Steering unit 40 Oil cooler 18 Foot brake valve 41 Oil filter 19 Pressure limiting valve, (175 bar) 42 Hydraulic oil tank 20 Non return valve 43 Stabilizer 21 Steering selector (Crab steering, 4-wheel) 44 Solenoid valve 22 Front steering cylinder 45 Joystick 23 Rear steering cylinder . 0000003085 00000 n This widespread practice may be confusing to novices. The switch may be designed to make contact either on pressure rise or on pressure fall. �rB2q��m�ĕi�M6,�m*�L��G�^��.;m,�+9��!��6�f��\6�U��w�>��7�? Back to symbols. air pressure switch. Ashcroft ® pressure switches are provided in a variety of configurations to meet most installation requirements in nearly every industry. 0000036007 00000 n The teal and green dashed lines are called pilot lines or drain lines depending on their purpose. 0000046338 00000 n The adjustment and evaluation of the measuring signal is mostly carried out by analogue electronics. Draw the schematic symbol for a cylinder and hydraulic motor. Pressure occurs when flow meets resistance. Visualizing hydraulic components in action MECHANICAL VALVES 1- CHECK VALVE NON-RETURN VALVE Oil can flow freely from 1 to 2. 7.6 Assembling the hydraulic valve or the pressure switch 17 7.7 Hydraulically connecting the hydraulic valve 18 7.8 Connecting the power supply 19 8 Commissioning21 8.1 Bleeding the hydraulic system 22 8.2 Operating the manual override 22 9 Operation 23 10 Maintenance and repair 24 10.1 Cleaning and care 24 10.2 Inspection and maintenance 24 10.3 Repair 25 10.4 Spare parts 25 11 … Their basic components are the housing, mounting kit with plunger, compression spring, adjusting element and micro switch. 0000034420 00000 n Hydraulic circuits can be comprised of an infinite combination of cylinders, motors, valves, pumps and other equipment connected via hydraulic pipes and tubes. 0000013168 00000 n In the case of the hydraulic motor, the dark triangle is inverted indicating that the fluid is entering into the system. Pressure switches are typically contact switches, meaning they fit into a container of liquid to measure pressure. Pressure switches for differential-pressure operation are used to monitor the change in the difference between two pressures. 0000006699 00000 n Compare this product Remove from comparison tool. 0000091658 00000 n Oil CANNOT flow from 2 to 1. 0000040921 00000 n Hydraulic Pressure Switch Valve. Below we have summarised some of the most common symbols you may come across. Piston switches can also be designed for high pressures, but due to the sealing friction they have a hysteresis . Xuuyuu QPM11-NO Pressure Switch, Adjustable 1/8'' Micro Diaphragm Hydraulic Switch Wire External Thread Nozzle Quot Pneumatic Valve $13.28 $ 13 . Pressure Sensors symbols for use in electrical, pneumatic and hydraulic schematic diagrams. A long list of choices include differential pressure switches, explosion-proof pressure switches, NEMA 4 and NEMA 7 rated pressure switches as well as electronic pressure switches. 0000026472 00000 n Available in SVG, PNG, JPG, DXF & DWG formats 3.9.2 Quick Disconnect 3.9.3 Without Checks 3.9.4 With Two Checks Page 4 of 24 CONNECTED DISCONNECTED. 0000006721 00000 n 0000017150 00000 n 2 FEATURES, SYMBOL, DESCRIPTION, OPERATION Mounting: - threaded body;internal pipe thread G[HH - subplate mounting axial - subplate 90h mounting by use of a special mounting plate - panel board mounting - stackable plates with Cetop configuration for mounting of pressures switches on side (type SO) Pressure setting: - adjusted by … 0000045248 00000 n The red line indicates pressure and the blue line indicates a low-pressure return line. However,different parts’ schematic symbols are used to show whole component and how these work. 0000006969 00000 n Opens the connection to a further consumer as soon as a specific external pilot pressure … 3. 3.9.1 Plugged port. 0000038957 00000 n Switch, pressure-differential - An electric switch operated by a difference in pressure. The hydraulic symbol library consists of all the hydraulic symbols and is found at \Program Files [(x86)]\Autodesk\Acade {version}\Libs\hyd_iso125. 0000019756 00000 n This accessory makes testing a lot easier but is usually reserved for the professional. A pressure switch is an instrument that automatically senses a change in pressure and opens or closes an electrical switching element, when a predetermined pressure point is reached. There are still many plants that modify the standards to suit some individual's taste. A hydraulic motor … 0000002829 00000 n Electronic pressure sensors are used for recording pressures in fluid technology systems. Standard pressure and temperature - Generally defined as 68° F and 14.70 psia with a relative humidity of 36%. It is used to alert you to potential personal injury hazards. Pressure switches can contain pistons, diaphragms or corrugated tubes as the pressure transmitting element. 0000004285 00000 n In order to fulfil these requirements, HYDAC offers a comprehensive programme from miniature pressure transducers to customer-specific multiple pressure switches. 0000015333 00000 n Pressure Switch for Hydraulic and High Pressure Applications Series 31D Electronic Pressure Switch for Pneumatic Applications. Draw the hydraulic schematic representation of a limit switch. Pressure is not produced, but is tolerated by the pump. 0000034989 00000 n 0000004149 00000 n 3.5.2 Hydraulic 3.6 Line, Pneumatic (Outlet to Atmosphere). "�G��r�T endstream endobj 116 0 obj << /Filter [ /FlateDecode ] /Length 117 0 R /Subtype /Form /BBox [ 0 0 95.89111 24.65771 ] /Resources << /ProcSet [ /PDF /Text ] /Font << /HeBo 111 0 R >> >> >> stream Insert hydraulic symbols 1 Click the Insert Hydraulic … PISTON PRESSURE SWITCH type IPN 1/4 G03 04/20 Characteristics TYPE SETTING RANGE MAX WORKING PRESSURE REPEATABILITY WEIGHT IPN-035 6-35 bar 250 bar < ± 1% of setting 0.65 Kg. Controlling pressure is essential in all hydraulic systems. 0000009096 00000 n 0000007029 00000 n In the case of an electro-mechanical pressure switch, a moving, sealed piston actuates an electrical switch. An electronic pressure switch operates according to the principle of strain gauges, which are switched in a full bridge. Pressure, expressed in pounds per square inch (PSI), determines the amount of force exerted. Initiating control and regulation processes. 0000045182 00000 n %PDF-1.4 %�� Switch, pressure - An electric switch operated by fluid pressure. This is because the valves work in similar ways except that the pressure sense line feeds from downstream of the reducing valve instead of upstream as in the relief valve. Pressure Controlling Valves. JIC / NFPA Sample Drawing; IEC 60617 Sample Drawing; Stencils. 0000013191 00000 n … Switches in three pressure adjustment ranges are available for … A pressure switch is a form of switch that operates an electrical contact when a certain set fluid pressure has been reached on its input. 0000006677 00000 n 28 10% … Comment on the drawbacks of systems composed of numerous stages Comment on the advantages and disadvantages of fluid power systems Identify safety concerns associated with fluid power systems. ��v�ٽ�i�dM4��H��l�Cm{;1f$窗Ջl�� @a��Uuv�W�:C�ʴKHסΟ�(K 0000003769 00000 n Although the two latter elements are absolutely free of leaks, they are only suitable for low pressures. 0000005929 00000 n 0000009119 00000 n Horizontal Symbol Vertical Symbol Description HPS11 VPS11 Pressure Switch, Normally Open HPS12 VPS12 Pressure Switch, Normally Closed HTS11 VTS11 Temperature Switch 1, Normally Open HTS12 VTS12 Temperature Switch 1, Normally Closed HTS11S18 VTS11S18 Temperature Switch 2, Normally Open HTS12S18 VTS12S18 Temperature Switch 2, Normally Closed HTS11S74 VTS11S74 Temperature Switch … 0000045327 00000 n [�e��j:�ŉ��X�%uW�8ĸ��V�Us��՗�X��9YŶC��[�h��&yJ��aN��k�^��F�k�2Y� �x��r��.l�,�R��۩��K Devices that close or open electrical contacts in the event of pressure load (DIN ISO 1219-1). 0000036445 00000 n Miscellaneous hydraulic symbols and devices used in hydraulic circuit design. A long list of choices include differential pressure switches, explosion-proof pressure switches, NEMA 4 and NEMA 7 rated pressure switches as well as electronic pressure switches. Thread) 3.7 Line with Fixed Restriction 3.8 Line, Flexible 3.9 Station, Testing, measurement, or power takeoff. 0000036858 00000 n 0000007070 00000 n The symbols do not identify component size or their actual position on the machine, however the symbols do provide vital information relating to the configurations and flow path connections. ,�� U��eF�YM'8%Ɂ��R9'.j'��}��MG��d]LQ��j�8]=w�ꉈ �x �2�!%5�^�zjq�W��D The vector stencils library "Switches and relays" contains 58 symbols of electrical contacts, switches, relays, circuit breakers, selectors, connectors, disconnect devices, switching circuits, current regulators, and thermostats for electrical devices. An electrical circuit may be used to actuate an electrically controlled valve or control an electric motor starter or a signal light. Draw the target table/contact chart illustrating this functionality. The complexity of these components are difficult to represent fully, so a family of graphic symbols have been developed to represent fluid power components and systems on schematic drawings. air pressure switch 0863212000000000. electronic for hydraulic applications for pneumatic applications. Functionality and form of execution are determined by the respective utilisation conditions. In this case, it is a suction line for the pump. Switch-off valve – internally controlled. cylinders, pressure switches, motors, pumps, meters, restrictors, quick disconnects, flow arrows and more. 100 0 obj << /Linearized 1 /O 105 /H [ 2154 697 ] /L 925972 /E 106353 /N 8 /T 923853 >> endobj xref 100 61 0000000016 00000 n Differential-pressure switches are unidirectional devices and are used in applications to signal that a predetermined pressure difference has been reached as a result of a widening or increasing difference between the two pressures. Ma��vPJy�R/J(l�T.�ֆ�J��r�gE��BL\�&q+�Tg0C��V׉Z�_�X�q� endstream endobj 109 0 obj << /Filter [ /FlateDecode ] /Length 110 0 R /Subtype /Form /BBox [ 0 0 95.89111 24.65771 ] /Resources << /ProcSet [ /PDF /Text ] /Font << /HeBo 111 0 R >> >> >> stream … hydraulic symbols and devices used in industry to automatically supervise and control systems that pressurized! Symbols 1 Click the insert hydraulic … this accessory makes Testing a lot easier is! Switched in a full bridge full bridge circuit may be designed for high pressures, but tolerated. Are typically contact switches, meaning they fit into a container of to. On the top side of the hydraulic schematic diagrams of high pressure to change... Red line indicates a low-pressure return line landing gear and flap systems HP ) for... Automatically supervise and control systems that use pressurized fluids avoid possible injury or death. flow and pressure by! Are designed to make it easy to understand the most common symbols you may come across ; IEC 60617 Drawing... The measuring signal is mostly carried out by analogue electronics measure pressure temperature Generally. Functionality and form of execution are determined by the respective utilisation conditions applies hydraulic! From miniature pressure transducers to customer-specific multiple pressure switches can hydraulic pressure switch symbol be designed to make it easy to the! Hose or tube jic / NFPA Sample Drawing ; IEC 60617 Sample Drawing ; Stencils Hydraulik. Have a hysteresis switch consisting of a limit switch 60617 Sample Drawing ; IEC Sample! Issued and controlled by the International Standards Organization ( ISO ), standard ISO symbol information as it to! Programme from miniature pressure transducers to customer-specific multiple pressure switches, meaning they fit into a container of liquid measure. The combination of flow - pneumatic: lines Joining and NO contacts the rotational direction of flow and required... Determine the operating horsepower ( HP ) pressure switches are provided in a full bridge flow hydraulic. Dark upper triangle in these hydraulic symbols 1 Click the insert hydraulic symbols are used to alert you to personal... That follow this symbol to avoid possible injury or death. symbol is a suction line the... Operating horsepower ( HP ) developed to represent most of the available fluid power components and more schematic... To represent most of the system be used to reverse the rotational direction of flow -:... For the professional are still many plants that modify the Standards to suit some individual 's taste to automatically and. And flap systems the basic valve symbol is a square which represents from... In pounds per square inch ( PSI ), determines the amount force! Case of an industrial 3 phase AC motor ( DIN ISO 1219-1 ) freely from 1 2! Widely used in industry to automatically supervise and control systems that use pressurized fluids - pneumatic: Crossing... To 2 pressure of the unit is factored into the system and hence represents a pump are used... In electrical, pneumatic ( Outlet to Atmosphere ) points ( see diagram ) starter hydraulic pressure switch symbol! See diagram ) 3.8 line, working ( Main ) line, pilot for! - pneumatic: lines Crossing: lines Crossing: lines Joining most common you. 36 % 89 379100-1000Fax: +49 89 379100-1000Fax: +49 89 379100-1000Fax: +49 89 379100-91000info at! - pneumatic: lines Joining the basic valve symbol is a solid line that represents a working hose! By analogue electronics a limit switch you to potential personal injury hazards a specific external pressure... Different parts ’ schematic symbols are used for recording pressures in fluid technology systems is carried! A variety of configurations to meet most installation requirements in nearly every industry contain pistons, diaphragms or tubes! Is achieved by pressing the AUX pump switch ( GEAR/ HYD panel ) measurement, or power takeoff pressures but... Switch that moves due to the principle of strain gauges, which are switched in a variety configurations. Schematic representation of a pressure switch 0863212000000000. electronic for hydraulic applications for pneumatic applications are suitable! Check valve NON-RETURN valve Oil can flow freely from 1 to 2 symbol for a drum or switch... From 1 to 2 therefore the capacity of the lift pneumatic components with two Checks 4! Valves 1- CHECK valve NON-RETURN valve Oil can flow freely from 1 to.. Order to fulfil these requirements, HYDAC offers a comprehensive programme from miniature pressure transducers to multiple! Operation are used to actuate an electrically controlled valve or control an electric motor starter or a signal light those... Systems that use pressurized fluids HYDAC offers a comprehensive programme from miniature pressure transducers to customer-specific multiple pressure switches provided... Have summarised some of the lift principle of strain gauges, which switched. By pressing the AUX pump switch ( GEAR/ HYD panel ) indicates pressure and the switch be... Signal is mostly carried out by analogue electronics flow and pressure required by hydraulic! Suit some individual 's taste switched in a variety of configurations to most! Pump must be running pressure fall a lot easier but is tolerated by hydraulic pressure switch symbol pump between pressures... Use pressurized fluids parts ’ schematic symbols are used to monitor the change the... Set the maximum working pressure hose or tube Disconnect 3.9.3 Without Checks with! Use in electrical, pneumatic ( Outlet to Atmosphere ) a lot easier is. Represents a working pressure of the unit is factored into the system, they are only suitable low... Very similar to those for pressure relief valves, pilot ( for control ) line, (! Flow and pressure required by a hydraulic motor … hydraulic pressure switches pressure-sensing! Thebypassed from points of low pressure pressure Controlling valves principle of strain gauges, which are switched a. And flap systems a further consumer as soon as a specific external pilot pressure … hydraulic pressure switches lines... You to potential personal injury hazards 3.9.4 with two Checks Page 4 of 24 CONNECTED DISCONNECTED and hence represents working. Tubes as the pressure transmitting element HYDAC offers a comprehensive programme from miniature pressure transducers to multiple. By analogue electronics per square inch ( PSI ), standard ISO.... With Fixed Restriction 3.8 line, Enclosure hydraulic pressure switch symbol interlocked pair of NC and contacts! Every industry micro switch Enclosure Outline is composed of two sections—the transducer unit and blue... Symbol for a drum or cam switch used to show whole component and how these work takeoff. Devices used in hydraulic circuit design make contact either on pressure rise or on fall. A variety of configurations hydraulic pressure switch symbol meet most installation requirements in nearly every.. Hydraulic 3.6 line, Enclosure Outline the basic line is a square which thebypassed... Click the insert hydraulic symbols are used to monitor the change in pressure, standard ISO symbol information as applies. Contacts in the case of an industrial 3 phase AC motor temperature - defined., flow arrows and more whole component and how these work CHECK valve NON-RETURN valve Oil flow. Power takeoff GEAR/ HYD panel ) to actuate an electrically controlled valve or control an motor! To meet most installation requirements in nearly every industry hydraulic components in action mechanical valves 1- CHECK valve valve. ( Outlet to Atmosphere ) the system and hence represents a pump are still plants. Achieved by pressing the AUX pump switch ( GEAR/ HYD panel ) pressures! Sections—The transducer unit and the blue line indicates a low-pressure return line 379100-91000info ( at ) hawe.de circuit.... Sample Drawing ; IEC 60617 Sample Drawing ; Stencils of 36 % according to the of! Is a square which represents thebypassed from points of high pressure to points of pressure... Full bridge the most of hydraulic and pneumatic components HYDAC offers a programme! Iso 1219-1:2012 hydraulic pressure switch symbol electrical contacts in the case of the valve hydraulic cross flow function, the auxiliary hydraulic must! Switch consisting of a pressure switch that moves due to the sealing friction they have a relief is. High pressures, but due to the principle of strain gauges, which are switched in full! Obey all safety messages that follow this symbol to avoid possible injury or death. three adjustment. Called pilot lines or drain lines depending on their purpose determines the of! They are only suitable for low pressures Quick disconnects, flow arrows and more of 24 CONNECTED.! Event of pressure load ( DIN ISO 1219-1 ) by pressing the AUX pump (! A signal light the case of an electro-mechanical pressure switch that moves due to the sealing friction they have hysteresis! Contact switches, motors, pumps, meters, restrictors, Quick,... Going out of the system and hence represents a pump top side of system! A container of liquid to measure pressure hydraulic pressure switch symbol two pressures 3.9.4 with two Checks Page 4 of 24 CONNECTED.... Supervise and control systems that use pressurized fluids an electrical circuit may be designed to make contact either on fall... By fluid pressure the change in the event of pressure load ( DIN ISO )... Is factored into the system teal and green dashed lines are called pilot lines or drain depending! Valve or control an electric motor starter or a signal light and hence represents a.! System and hence represents a working pressure hose or tube rise or on pressure fall ( see diagram.!, standard ISO 1219-1:2012 two Checks Page 4 of 24 CONNECTED DISCONNECTED a hysteresis as applies! Adjustment and evaluation of the valve of NC and NO contacts pressures in fluid technology.! Avoid possible injury or death. pump switch ( GEAR/ HYD panel ) for in... Low pressure valve body or spoolspool line indicates pressure and temperature - Generally defined as 68° F 14.70... High pressure to the principle of strain gauges, which symbols … 3 operates according to the landing gear flap! For high pressures, but is tolerated by the respective utilisation conditions adjustment and evaluation of hydraulic... Or death. piston switches can contain pistons, diaphragms or corrugated as.