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This type of valve is actuated by pressure acting on a piston or diaphragm. The fluid is usually neutral e.g. air, water, hydraulic oil. The pressure range varies and is specified accordingly in a data table.
"Normally Closed" (N/C) valves of this type remain closed under spring pressure, when de-activated.
"Normally Open" (N/O) valves of this type remain open under spring pressure, when de-activated.
When pressure is connected to port "Z" the valves open or close according to type.
A separate 3/2 pilot valve is used to supply pressure to port "Z", it is mounted either directly on the actuator or remotely.
In some cases a 4/2 or 5/2 pilot valve will be required. The main valve position can be N/C or N/O. The basic position is determined by connecting the pilot valve output lines accordingly. (The direction of flow is usually indicated by an arrow or shown schematically on the body).
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ASCO/JOUCOMATIC has developed a wide range of valves for all fluids, whether neutral or aggressive, made out of brass, bronze, cast iron or 316L stainless steel.
Reliability is ensured by:
* A monobloc rod, with stainless steel from the reed to the piston
* Guidance by 2 extra-large PTFE bearings.
Pilot solutions: solenoid valves on valves or mounted on subbases and valve islands.
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TORK T-PV Series ,pneumatic piston valve
application: water,air,steam,gas,natural gas,chimicals,petroleum products,food,sterilazation,water treatment,dyeing,cleaning plant,aggressive liquids,vacuum application,oil,petrol,alcohole,hydroulic liquids,salt solutions,acids,organic solvent
All body is AISI316 Stainless Steel,high flow rate,high quality,compact,suitable vacuum application,normally open and normally closed position.
advantage of TORK pneumatic piston valves:less pressure drop than globe valve,
short open-close time
high flow rate
body and actuator AISI 316
screwed,flanged and welding connection
on-off and proportional control
TORK T-PV Series ,pneumatic piston valve series range
T-PV.S700 Serie; Screwed connection, 1/2"......2" G( BSP ), on request NPT connection..
T-PV.W700 Serie; welding connection, size :from 1/2"......up to 2" .
T-PV.F700 Serie; Flange connection,size:from NW15.....up to .NW50 .
T-G.3W Serie: Solenoid valve,1/4"-3/2 way.it is used on-off control pneumatic piston valves
T-SW Serie: Proximity switch limit switch box ,gives signal when valve open-closed.
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Piston faucet
DNN (Nominal Diameter): 15-400 (other diameters and pressures on requests)
PN (Pressure rating): 16-420
Faucet used to complete or control in the sectors of petrochemistry, chemistry, with risks of filling
TECHNICAL MAIN FEATURES
Execution: A105, AISI 316, AISI 304
Sealing PTFE or another seal with the request
Can be gone up with all types of actuators
Connection of the actuators according to ISO 5211
Flanges fixing or to weld
Technology: Moulded or Forged
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Novafix VD-...GR
Mechanical Flow Switch for liquids or gaseous media, with contactless triggering of an adjustable reed switch.
Rugged design in brass / bronze combination.
good repeatability
dirt-resistant
exact setting of switch via scale
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Features:
- correct pole faces
- milled grooves
- careful machining of the sealing elements where required
- sealing elements
- aeration bore in the groove
- number of grooves a - 3 cost neutral
- also when the groove is on the face all passages without burr
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