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Zhejiang Guanlong Machinery Valve Co., Ltd.

Fast Close Hydraulic Check Valve, Non Slam Check Valve, API Check Valve manufacturer / supplier in China, offering Slow Open Fast Close Hydraulic Check Valve (GL30XB), Multiple Spraying Holes Type Multi-Functional Axial Plunger Control Valve (GLH942X), Multiple Spraying Holes Multifunctional Axial Flow Plunger Control Valve (GLH642X) and so on.

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Supplier Homepage Product Check valve / Non-return valve Lift type check valve Slow Open Fast Close Hydraulic Check Valve (GL30XB)

Slow Open Fast Close Hydraulic Check Valve (GL30XB)

FOB Price: US $20-300 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $20-300/ Piece
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Port: Ningbo, China
Production Capacity: 2000PCS/Year
Payment Terms: L/C, T/T

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Flanged End Check Valve
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Basic Info
  • Model NO.: GL30XB
  • Connection Form: Flange
  • Pressure: Ordinary Pressure
  • Sealing Form: Soft Seat Ring & Metal Seat
  • Standard: ANSI, API, DIN, BS, GB etc
  • Certificate: ISO, Ce
  • Trademark: KARFAR
  • Specification: DN50 ~ DN1800
  • Material: Ci, Di, CS, Ss etc
  • Structure: Elevated
  • Function: Nrvz Silence, Nrvg Silence
  • Flow Direction: Unidirection
  • Application: Industrial Usage, Household Usage
  • Pressure Rating: Pn10, Pn16, Pn25, Pn40 (Cl150, Cl300)
  • Transport Package: Bubble Plastic Paper + Plywood Case
  • Origin: China
Product Description
Slow Open Fast Close Hydraulic Check Valve 

Slow Open Fast Close Hydraulic Check Valve (GL30XB)Slow Open Fast Close Hydraulic Check Valve (GL30XB)

                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 coefficient of shock resistance is less than 1.0Mpa.

Δ When pump stops working, the valve rapidly 100% closes within 0.5 second avoiding 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 appliableWater, Oil etc.
Main materialDuctile iron, WCB, Stainless steel etc.
Suitable Temperature≤80ºC
Nominal PressurePN10--PN25
Nominal DiameterDN50--DN1800
Flange DimensionASME B16.42, BS4504, ISO2531, ISO7005 etc
Face to Face LengthAPI594,BS5155, ISO5752, DIN3352 etc
Slow Open Fast Close Hydraulic Check Valve (GL30XB)
Slow Open Fast Close Hydraulic Check Valve (GL30XB)
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