• Shenzhen Wofly Technology Co., Ltd.
    Dariof Fassini
    All perfect. Quality is 4.5 on 5 but quality to price ratio is excellent.
  • Shenzhen Wofly Technology Co., Ltd.
    Jasper Mokkink
    I have had an great experience ordering from Wolfy! The communication was always quick and clear. Adding parts to your order after you made your payment is also accepted by Wolfy. They are also willing to hold your order for a little bit if you need time to decide what additional parts you would like to add. I ordered compression fittings.
Contact Person : Catlin Zeng
Phone Number : 0086-13430639757
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Oxygen Flow Stainless Steel Pressure Regulator For Welding With Diaphragm Valve

Place of Origin Guangdong, China (Mainland)
Brand Name AFK
Certification CE
Model Number R31
Minimum Order Quantity 1 Piece/Pieces
Price Negotiable
Packaging Details white box + export carton
Supply Ability 3000 Piece/Pieces per Day

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Product Details
Material 316L Screw Thread Requirement Thread
Input Pressure 500 3000psi Type Two-stage
Suitable Gas Oxygen/lpg/air/propane/Acetylene/Argon/nitrogen Application According To Requirements Of Clients
Color Silvery White Outlet Pressure Range 0~250psi
Warranty 1 Year Weight 1.4 Kg
High Light

flow control valve


gas cylinder regulator

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Product Description

R31 Serie stainless steel pressure reducers, double-stage diaphragm pressure reducing construction, stable output pressure, applied to high pure gas, standard gas, corrosive gas and so on 


Design Features

Five holes on the body

two-stage decompression structure

Metal-to-metal diaphragm seal

Body thread:  1/4” NPT(F)

Easy to clean inside

Filter  inside 

Panel mounting and wall mounting available

Optional outlet: needle valve, diaphragm valve  


Maximum inlet pressure: 3000, 500psig

Output pressure:0~25, 0~50, 0~100, 0~250psig

Safe testing pressure: 1.5 times maximum inlet pressure

Working temperature: -40~+165(-40~+74)

Leakage rate: 2×10-8 atm.cc/sec 

C value=0.06 

Typical Application


Gas laser

Gas bus-bar

Petrochemical industry

Testing equipment


Body: 316L, Brass

Bonnet: 316L, Brass

Diaphragm: 316L

Strainer: 316L(10μm)

Seat: PCTFE, PTFE, Vespel

Spring: 316L

Stem: 316L

Ordering Information: 
 Oxygen Flow Stainless Steel Pressure Regulator For Welding With Diaphragm Valve 0
Item Body Material  Body Hole Inlet pressure  Outlet pressure  Gauge Inlet connection Outlet connection Optional
R31 L:ss316L M D:3000PSI G:0-125psi G:Mpa 00:1/4NPT F 00:1/4"NPT F P:panel mount
  B:brass Q F:500PSI I:0-75psi P:psi/bar  01:1/4"NPT M 01:1/4"NPT M R:attached safety relief valve
        K:0-25psi W:no gauge 23:CGA330 10:1/8O.D. N:attached needle valve
        L:0-15psi   24:CGA350 11:1/4O.D. D:attached diaphragm valve
        Q:30"Hg Vac-30psig   27:CGA580 12:3/8O.D.  
        S:30"hg Vac-60psig   28:CGA660 15:6mmO.D.  
        T:30"hg Vac-100psi   30:CGA590 16:8mmO.D.  
        U:30"Hg Vac-200psi   52:G5/8"-RH(F) 74:M8*1-RH(M)  
 Once you send the inquiry, pls send order code e.g.:R31-L-M-D-G-P-00-00-P.  Or pls send us following information so that we select select model: 
1.Media (sevice as)? co2 or?
2.atual inlet pressure and outlet pressure? 
3.Flow rate?
4.Inlet connection and out connection? 
5.Material or ss316?