Our piston valve
No dead space, particularly suitable for high viscosity and polymerising fluids.
DN 15 to DN 250
1/2″ to 10″
PN 10 to PN 420 acc. to size
150 to 2500 Lbs acc. to DN
Functions – Piston valve
♦ tank or reactor bottom outlet valve
♦ feeding valve: side mounted or upright
♦ sampling or injection valve: at tank bottom or laterally / on a section of piping
♦ walls cleaning by spraying or streaming: installed on reactor dome
♦ In-line stop valve, no dead areas
Operating principle – Piston valve
♦ Shutter: Right Piston and polished (stellite in option)
♦ Process/Atmosphere sealing with stuffing box (repackable in service)
♦ Full bore
♦ Low pressure drop
Fabrication – Piston valve
- Construction materials: Carbon Steel (CS), Stainless Steel (SS), Duplex & Super Duplex, Titanium, Zirconium, Uranus® B6, Tantalum, Nickel, Hastelloy®, Monel
- Construction Methods: Fabricated (Welded), Cast
Uses – Piston valve
- Service conditions: High pressure, High temperature, Low temperature, Abrasion, Corrosion, Vacuum
- Types of fluids: Liquids, Liquids with solid particles, Gas, Powder and powdery media, High viscosity fluids
- Applications: Fine chemicals, Plastics and polymers, General chemicals, Petrochemicals
Features & Options
Sealing system
♦ Conical metal-to-metal piston seating
♦ Radial soft seating with packing, O’ring, etc.
Operation
Handwheel or crank according to size, handle + return spring (dead man handle), double acting pneumatic actuator, single acting pneumatic actuator (acc. to DN, Class and/or stroke), hydraulic actuator, electric actuator, air cylinder.
Closing device
Piston with conical seating, straight piston.
Options – Piston valve
– Adaptation to any type of connection
– Contoured piston to match the tank or line profile (no dead area)
– Crust breaking function
– Hard faced seating surfaces according to media and/or pressure
– Vacuum tight
– Firesafe design
– Heating jacket
– FDA grade gaskets and packings
– Leak detector at stuffing box
– Interchangeable seat
– Inside and/or outside polishing
– Additional draining and/or cleaning nozzles
– Stroke limit or proximity switches
– Manual override for pneumatic actuator
– Dry air actuator
– Stainless steel pneumatic actuator
– Pneumatic actuator with stroke damper if trip time > 50 mm/s
– Actuator locking system (safety)
– Manual operator with locking mechanism
– Chain handwheel
– Manual operator extension, if required with cardans
– Manual operator mounted on ISO base for later adaptation of actuator
– Electric actuator with local/remote controls
CAUTION: Some options are not compatible.
