Solenoid Valves Basics - Process Control and …

1 Technical Information276 Solenoid Valve BasicsSwitching Functions & Symbols ..280 Number of Ways ..281 Direct Acting Solenoid Valves ..282 Solenoid Valves without Differential Pressure ..282 Solenoid Valves with Differential Pressure ..283 Media Separated Solenoid Valves ..283 Proportional Solenoid Valves ..284 Motorised Proportional Valves ..285 Motorised Proportional Valve Characteristic ..286 Seat Valves ..286 Zero Delta P Valves ..287 Operating Voltage ..287 Explosion Protection ..288 Response Time & Cycling Rate ..288 Manual Override ..289 Protection Class (IP Protection) ..289 Valve Selection Criteria ..290 Materials - Seals ..290 Materials - Polymers ..291 Materials - Metals ..291 Click-on Solenoid ValvesClick-on - Solenoid Valves ..292 Click-on - Diaphragm Valve ..292 Click-on - Piston Valve ..292 Pressure Actuated ValvesPressure Actuated Valves Principle of Operation.

2 293 Pressure Actuated Valves Conversion from NC to NO ..293 Electric Position Indicator ..294 Stroke Limiting System ..294 NAMUR Adapter Plate ..295 Pressure, Flow and MediaPressure Ranges ..296 Vacuum and Buschjost Valves ..296 Calculating Flow Rates ..297 Viscosity ..297pH-Value ..298 Ammonia & Buschjost Valves ..298 Steam, Hot Water & Buschjost Valves ..299 Liquefied Gas & Buschjost Valves ..299 Oxygen & Buschjost Valves ..300 Dust Collector CleaningDust Collector Valves and Systems ..301 Facts about Buschjost Dust Collectors Valves ..302 Dust Collector Valves & Blow Tubes ..302 Differential Pressure Regulators ..303 Pressure Build-up Time ..303 Air Tanks ..304 Timer Solenoids ..304 Pneumatic Valve Controller ..305 Humidity and Frost ..305 Commercial VehiclesValves in Commercial Vehicles ..306 Heating Circuits In Commercial Vehicles ..306 Buschjost TechnologiesBuschjost Part Numbering System.

3 307 Installation ..307 Maintenance ..308 Electrical Connection ..308 Buschjost Solenoids ..309 Buschjost Solenoids - Heating ..309 Latching Buschjost Valves ..310 Timer Solenoid ..310 EMC Electromagnetic Compability ..311 Flange Dimensions ..311 Available Strainers ..312 Position Indicators ..312 Servo Amplifier ..313 Valve Seat Tightness ..313 Valve Blocks ..314EC Type examined Valves to DVGW requirements ..314 Test Certificates to DIN 50 049 / EN 10 204 ..315 Quality and Environmental Management ..315 Pressure Equipment DirectivePressure Equipment Directive (PED) ..316 Safety InstructionsSafety Instructions for all Norgren and FAS series ..318 ATEX and Buschjost ValvesATEX .. Information277 Solenoid Valves without Differential Pressure* DVGW EN 161 and EN 162 approval, ** test certificateSolenoid Valves with Differential PressurePressurebarConnectionTemperature BrassStainlesssteelGrey castironPVDFCast steelGun metalAluminiumPPSPAPPO GF30 Hot water / steam0 - 10 Subbase+30 CMicrosol - 10 G 1/4 - G 1+150 C8247082470 max.

4 150 - 16 G 1/4 - G 2+90 C82400 8273082400 option 14 max. 110 - 1/2 - G 3/4+50 C84070 NPT 1/2 - NPT 3/4+50 - 10 DN 65 - DN 150+90 - 16 DN 15 - DN 100+90 - 40 G 1/4 - G 2+90 C8530085300 option 14 max. 130 CDN 15 - DN 100+90 C8434084340 option 14 max. 110 - 16 DN 20 - DN 50+80 C8305083050 option 14 max. 110 - 25 G 1/4 - G 1+200 C8532085320 max. 200 CPressurebarConnectionTemperatureBrassSt ainlesssteelGrey castironPVDFCast steelGun metalAluminiumPPSPAPPO GF30 Hot water / steam0 - 1/2 - G 2+90 C82660 826700 - 7G 1/4 - G 3/8+110 C8208082080 max. 110 C0 - 8 Subbase / Cartridge+50 CChipsolSubbase+30 CPicosolG 1/4 - G 1+60 C82370*0 - 10 Subbase+30 CMicrosol MicrosolG 1/4 - G 1+150 C8436084360 max. 150 CG 1/4 - G 1/2+90 C82530 8256082530 option 51 max. 150 C0 - 14G 1/4+80 C950000 - 16DN 15 - DN 50+110 C8514085140 max. 110 CDN 15 - DN 50+200 C851208522085120 max.

5 200 CDN 15 - DN 50+90 C8510085100 option 14 max. 110 CDN 15 - DN 50+90 C8334083340 option 14 max. 110 CDN 65 - DN 100+110 C8414084140 max. 110 CDN 65 - DN 100+150 C841208422084120 max. 150 CDN 65 - DN 100+90 C8410084100 option 14 max. 110 CG 1/4 - G 2+200 C8572085720 max. 200 CG 1/4 - G 2+90 C82540 8259082540 option 14 max. 110 C0 - 23G 1/8 - G 1/4+80 C Bacosol0 - 25DN 15 - DN 50+90 C852408520085240 option 14 max. 110 CDN 15 - DN 50+90 C8564085640 option 14 max. 110 C **DN 65 - DN 100+90 C842408420084240 option 14 max. 110 CG 1/4 - G 2+90 C85700 8574085700 option 14 max. 110 CG 3/8 - G 1+90 C8504085040 option 14 max. 110 C0 - 40G 1/8 - G 3/8+90 C82510 82610on request0 - 50G 1/8 - G 1/4+120 C9510095100 max. 120 - 15 Subbase+50 Information278 Pressure Actuated ValvesPilot Valves for pressure actuated valvesPressurebarConnectionTemperatureBr assStainlesssteelGrey castironPVDFCast steelGun metalAluminiumPPSPAPPO GF30 Hot water / - 6G 1/4 - G 1/2+90 C8271082710 option 14 max.

6 110 C0 - 10DN 15 - DN 150+80 C83380on requestDN 32 - DN 50+180 C8488084880 option 60 max. 200 CDN 32 - DN 50+180 C8489084890 option 60 max. 200 CG 1/2 - G 2+60 C82580*G 1/2 - G 2+80 C83350on request0 - 12G 1/8+120 C9610096100 max. 120 C0 - 16DN 15 - DN 100+180 C8320083200 option 95 max. 300 CDN 15 - DN 100+180 C8324083240 max. 180 CDN 15 - DN 25+180 C8476084760 max. 180 CDN 15 - DN 25+180 C8477084770 max. 180 CDN 15 - DN 50+180 C8454084540 max. 180 CDN 15 - DN 50+180 C8455084550 max. 180 CDN 15 - DN 50+180 C8458084580 option 60 max. 200 CDN 15 - DN 50+180 C8459084590 option 60 max. 200 CG 1 1/4 - G 2+180 C82280 8248082280 option 59 max. 200 CG 1/2 - G 1+180 C84720 8474084720 max. 180 CG 1/2 - G 2+180 C82180 8238082180 option 59 max. 200 CG 1/2 - G 3+180 C84500 8452084500 max. 180 CG 1/2 - G 2+180 C8325083250 max. 180 C0 - 18G 1/4+80 C960000 - 25G 1/8 - G 1/2+110 C84180 84190on requestDN 15 - DN 25+140 C83860* - 16 G 1/4 - G 2+90 - 10 DN +60 C84660DN +60 C846802 - 8G 1/4+120 C97100* DVGW EN 161 approval* NAMURP ressurebarConnectionTemperatureBrassStai nlesssteelGrey castironPVDFCast steelGun metalAluminiumPPSPAPPO GF30 Hot water / steam0 - 12G 1/8+120 C96100 0 - 18G 1/4+80 - 10 DN +60 C84660 DN +60 C84680 2 - 8G 1/4+50 C97100* Information279 Valves and Systems for Dust FiltersPressurebarConnectionTemperatureB rassStainlesssteelGrey castironPVDFCast steelGun metalAluminiumPPSPAPPO GF30 Hot water / - 8G 3/4 - G 2 1/2+85 C82900G 3/4 - G 2 1/2+85 C82960DN 25 and DN 40+85 C83920DN 25 and DN 40+85 C83930G 1 and G 1 1/2+85 C83300G 1 and G 1 1/2+85 C83320 Proportional ValvesPressure(bar)

7 ConnectionTemperatureBrassStainlesssteel Grey castironPVDFCast steelGun metalAluminiumPPSPAPPO GF30 Hot water / steam0 - 12 Flange / Cartridge+50 CFlatprop - 10 G 1/2 - G 1+90 C82880on Functions & SymbolsMost Solenoid Valves operate on a digital principle. They thereforepossess two distinct states, which are (1) - when the coil isactivated by an electrical current, and (2) - when the valve is resting(without electricity). Valve functions are defined from the direct acting or pilot operated Solenoid Valves may have twofunctions:Normally closed (NC)A Solenoid valve is normally closed (abbreviated - NC) if there is noflow across the valve in its resting position (with no current on thesolenoid contacts).SymbolPlease note that in the case of 3-way Solenoid Valves , port A isopen to port R which, for example, enables the valve s single-actioncylinder to be exhausted to open (NO)A Solenoid valve is said to be normally open (abbreviated NO)when it enables fluid to pass in its resting position (with no currenton the Solenoid contacts).

8 SymbolA specific choice of entry ports can change a valve s , since balanced-force calculations take rebound effects,coil effects and the effects of pressure exerted on the seal intoaccount, the performance of an NC valve fitted in an NO positionwould be reduced. In this configuration it would be better to choosea universal Solenoid or Bi-stableWe manufacture Solenoid Valves designed for applications wherereduced energy consumption is the determining factor. For theseapplications a short electrical impulse enables the Solenoid valve to be opened or closed, and thanks to the residual effects of apermanent magnet this is sufficient for maintaining the valve in aparticular working position with no electrical energy short impulse of inverted polarity ensures the valve s return to itsprevious position. Electrical power consumption and heating arealmost Valve Basics280 Example of 2/2-way normally closed Solenoid valveExample of 3/2-way normally closed Solenoid valveExample of 3/2-way normally open Solenoid valveExample of 2/2-way normally open Solenoid Valve Basics281 Number of Ways2 Ways ( 2/2- Valves )The Solenoid Valves have two ports (one inlet, one outlet) and onlyone orifice (seat) allowing fluid 1 port inlet fluidP1 port outlet fluidA3 WaysThese Solenoid Valves have three ports (one inlet, one outlet andone exhaust) and two orifices (seats) allowing fluid 1 port inlet fluidP1 port outlet fluidA1 port exhaust fluidRTypical application: to operate a single acting cylinderb.

9 1 port inlet fluidP2 port outlet fluidA1, A2 Typical application: to select or divert flowc. 2 port inlet fluidP1, P21 port outlet fluidATypical application: to mix two fluidsPAPAE xample of Solenoid valve de-energized to stop or energized to allow a flow of pressurized fluidPRAPRAA2A1PA2A1PP2P1AP2P1 AExample of Solenoid valve operating a single acting cylinderExample: Selector pneumatic connection where the pressure P is directed either to outlet A1 or outlet A2 Example: Mixer pneumatic connection where either pressure P1 or pressure P2 are directed to outlet A Valves without Differential Pressure(direct acting or indirect acting with forced lifting)The force produced by the Solenoid plunger, which is mechanicallycoupled to the main closure device, opens this type of sequence starts with the Solenoid opening the pilot relieves the pressure on the main closure device, bringing itinto balance so the Solenoid force can lift it into the open the pilot seat is closed, bleed orifices allow a force to build upon the closure device that pushes it down into the closed positionon the valve Valves are preferred for use where the differential pressure isvery low or Acting Solenoid ValvesThis type of valve is actuated entirely by the Solenoid force.

10 Theplunger with a seal acting as the main closure device is forceddirectly onto the valve seat by the fluid pressure and closing valve is opened directly by the Solenoid force closedPAValve openPAValve closedPAValve openSolenoid Valve Basics282 Note: You will find a video showing how our Valves operate on our Note: You will find a video showing how our Valves operate on our Valves with Differential Pressure(servo assisted, pilot operated or indirect acting)These Valves operate on the servo assistance principle, whichrequires a specified differential pressure for opening and Solenoid opens the pilot seat. This relieves the pressure on themain closure device, which is raised into the open position by theincreasing effective force on its of the pilot seat builds up a closing force on the mainclosure device via bleed orifices. Provided the inlet pressure is atleast the required differential higher than the outlet pressure, thevalve remains securely closedMedia Separated Solenoid ValvesMedia separated (MS) Solenoid Valves are specially designed fortransporting corrosive or ultra-pure are designed so that the valve s membrane (violet) enables the medium to be separated from the operating part of the valve(orange) while maintaining a minimum dead (unswept) the membrane and the valve body are highly resistant tochemical corrosion and can be easily opened for Valve Basics283 Note.