Zhejiang, China
Business Type:
Manufacturer/Factory & Trading Company
Main Products:
Number of Employees:
Year of Establishment:
Management System Certification:
ISO9001:2015 certificate
OEM/ODM Service
Sample Available

Non Slam Check Valve, Diaphragm Valve, Piston Valve manufacturer / supplier in China, offering Slow Open Slow Close Non Return Hydraulic Check Valve (GL30XA), Flat Plate Slab Gate Valve (Z43) Flange End, API Bellow Sealed Gate Valve and so on.

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Slow Open Slow Close Non Return Hydraulic Check Valve (GL30XA)

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Min. Order / Reference FOB Price
1 Piece US $20-200/ Piece
Port: Ningbo, China
Production Capacity: 5000PCS/Year
Payment Terms: L/C, T/T
Material: Ci, Di, CS, Ss etc
Connection Form: Flange
Structure: Elevated
Pressure: Ordinary Pressure
Function: Nrvr Silence, Nrvz Silence
Sealing Form: Soft Seat & Metal Seat

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Basic Info

Model NO.: GL30XA
Flow Direction: Unidirection
Standard: ANSI, API, DIN, BS, GB etc
Application: Industrial Usage, Water Industrial Usage, Household Usage
Pressure Rating: Pn10, Pn16, Pn25, Pn40 (Cl150, Cl300)
Trademark: KARFAR
Transport Package: Bubble Plastic Paper + Plywood Case
Specification: 2" ~ 48" (DN50 -DN1200)
Origin: China

Product Description

Slow Open Slow Shut  Hydraulic Check Valve 

Slow Open Slow Close Non Return Hydraulic Check Valve (GL30XA)Slow Open Slow Close Non Return Hydraulic Check Valve (GL30XA)
                  Diaphram type                                                                Piston type

Δ  The KARFAR Model GL30XA Slow open Slow shut check valve is multifunctional valve. It opens slowly and shut slowly to eliminate water hammer and prevent back flow. Single set of GL30XA can function to replace non-return valve, electric control valve and pressure surge eliminator. It is often mounted at the outlet side of the pump. In response to pilot signal, it slowly opens when the pump starts up. During the operation, the valve is fully opened under medium pressure, Since the chamber is connected with air, water loss is nearly none. When pump stops working, the valve slowly shuts to avoid pressure surge and slamming noise.

Δ low water loss, nearly zero. Controlling pressure less than 0.05Mpa and partial resistance coefficient is less than 1.0

Δ When pump stops working, the valves close in two steps. First main disc quickly close 90% and the small disc slowly close 100%(closing speed can be adjusted according to requirement at site), By this way, there is no pressure surge and slamming noise.

Δ It isolates the pump from the system during pump starting: When pump starts up, the valve is closed. When the pressure rises to the preset value, the valve slowly opens so as to avoid damage on the pump engine  from extra large currency . 

Medium applicableWater, Oil etc.
Main materialCast iron, Ductile cast iron, WCB, Stainless steel etc.
Temperature applicable≤80ºC
Nominal PressurePN10--PN40 (cl150, cl300)
Nominal DiameterDN50--DN1800
Flange DimensionASME B16.42, BS4504, ISO2531, ISO7005 etc
Face to Face LengthAPI594, BS5155, ISO5752, DIN3352 etc

Slow Open Slow Close Non Return Hydraulic Check Valve (GL30XA)
Slow Open Slow Close Non Return Hydraulic Check Valve (GL30XA)

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