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VARIVENT® SHUT-OFF VALVES

VARIVENT® Series

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


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.

Valve Selection Scheme: Shut-off Valves
VARIVENT® Series
Technical Data

Valve Selection Scheme: Shut-off Valves

Valve Selection Scheme:  Feature: Type
1.From bottom to top:    Modular system:  Single-seat valve, type N       
2.From bottom to top:      Long-stroke valves for viscous products or products with large particles : Single-seat long-stroke valve,type N_V                                                        
3.From top to bottom:Modular system :Single-seat valve, type U 
4.From top to bottom: With optimized maintenance, radial sealing:Single-seat valve, type U_R             
5.From top to bottom:Long-stroke valves for viscous products or products with large particles: Single-seat long-stroke valve,
type U_V              







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.

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"
IPS 2" – IPS 6":

Technical Data

Type N, N_V & U, U_V, U_R
Please refer to the catalog for information.

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

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