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VARIVENT® SHUT-OFF VALVES

Special Features

  • Certified, hygienic configuration
  • Metallic stop
  • Flexibility because of the modular principle
  • Proven seal geometry

Recommended Flow Direction

To avoid water hammers when closing the valve while the product is flowing, single-seat shut-off valves should be switched against the flow direction of the product.

Valve type N is designed for a flow from the lower to the upper pipeline, whereas valve type U is for the opposite flow direction.


VARIVENT® Series
The structure of the VARIVENT® modular system has many optional versions available to best optimize the valve in the process. Please refer to the options section in the catalog for information about these.

Application Examples

In practical use, these valves are used

  • as emptying / drainage valves
  • for shutting off a bypass line
  • as dosing valves

VARIVENT® long-stroke valves are used for transporting fluids with relatively large particles or for viscous products, such as yoghurt with pieces of fruit.



Sizes

Single-seat shut-off valves: Long-stroke shut-off valves

DN 25 – DN 150: DN 65 – DN 100

OD 1" – OD 6": OD 2 ½" – OD 4"

Valve Selection Scheme: Shut-off Valves
Technical Data Type N, N_V & U, U_V, U_R

Valve Selection Scheme: Shut-off Valves

Feature


From bottom to top:Modular system
From bottom to top:Long-stroke valves for viscous products or products with large particles
From top to bottom:Modular system
From top to bottom:With optimized maintenance, radial sealing
From top to bottom:Long-stroke valves for viscous products or products with large particles


Type


From bottom to top:Single-seat valve, type N
From bottom to top:Single-seat long-stroke valve,
type N_V
From top to bottom:Single-seat valve, type U
From top to bottom:Single-seat valve, type U_R
From top to bottom:Single-seat long-stroke valve,
type U_V















Technical Data Type N, N_V & U, U_V, U_R

Type N

Recommended flow direction:From bottom to top
Material in contact with the product:1.4404 / AISI 316 L
Material not in contact with the product:1.4301 / AISI 304
Seal material in contact with the product:EPDM, FKM, HNBR
Ambient temperature:0 to 45 °C
Air supply pressure:6 bar (87 psi)
Product pressure:5 bar (73 psi)
Surface in contact with the product:DN, OD, Ra ≤ 0.8 µm, IPS, Ra ≤ 1.2 µm
External housing surface:Matte blasted
Control and feedback system:T.VIS® control top
Actuator type:Pneumatic actuator air / spring
Connection fittings:Welding end
Identification:Adhesive ID tag
Valve seat version:Clamped or welded seat ring
Certificates:EHEDG, 3A, CE


Type N_V (longstroke)


Air supply pressure:4.8 bar (70 psi)
Product pressure:DN 65 – DN 80 OD 2 ½" – OD 3" 10 bar (145 psi) DN 100 & OD4"5.2 bar (75 psi)
Surface in contact with the product:Ra ≤ 0.8 µm
Valve seat version:Clamped or welded seat ring


Type U


Recommended flow direction:From top to bottom
Air supply pressure:6 bar (87 psi)
Product pressure:5 bar (73 psi)
Surface in contact with the product:DN, OD, Ra ≤ 0.8 µm, IPS, Ra ≤ 1.2 µm
Valve seat version:Welded seat ring
Certificates:3A, CE

Type U_R (radial)


Air supply pressure:6 bar (87 psi)
Product pressure:5 bar (73 psi)
Surface in contact with the product:Ra ≤ 0.8 µm
Valve seat version:Clamped or welded seat ring


Type U_V (longstroke)


Air supply pressure:4.8 bar (70 psi)
Product pressure:DN 80OD 3"5 bar (73 psi)DN 100 & OD 4"5.6 bar (81 psi)
Surface in contact with the product:Ra ≤ 0.8 µm