• Shenzhen Wofly Technology Co., Ltd.
    Dariof Fassini
    All perfect. Quality is 4.5 on 5 but quality to price ratio is excellent.
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    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.
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WL300 Changeover Manifold For Oxygen Nitrogen Co2 With Purge Function

Place of Origin Guangdong, China (Mainland)
Brand Name AFK
Certification CE
Model Number WL300
Minimum Order Quantity 1-9 Pieces
Price Negotiable

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Product Details
Material 316L SS Maximum Inlet Pressure 3000, 500psig
Output Pressure 0~25, 0~50, 0~100, 0~250psig Working Temperature -40~+74 Deg C
Applied Gas High Pure Gases, Standard Gases, Corrosive Gases And So On Certificate ISO9001:2008 CE
Body Material Ss316, Nickel Plated Brass Warranty 1 Year
Selling Units Single Item Single Package Size  36X15X26 Cm
Single Gross Weight 7.87 Kg Package Type PP Box +export Carton
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gas control panel


automatic switchover manifold

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Product Description

Product Description

WL300 Series Semi-automatic Changeover Device


It is suitable for high pressure gas cylinders and pressure relief gas supply on both sides, through the automatic changeover to realize continuous gas supply, with the function of purging.

The maximum input pressure of 20.7 Mpa (3000 psi), corrosion, clean workshop assembly test, suitable for laboratory, high purity gas such as gas analysis.


--With purge function for diaphragm valve 
--With three R11 pressure regulator  (can use other regulator instead)
--Supply the gas contiously ( connecting cylinders in 1*1, 2*2, 3**, 4*4 )
WL300 Changeover Manifold For Oxygen Nitrogen Co2 With Purge Function 0

Semi-Automatic changover Regulator with pressure transmitter

--Pressure transmitter can monitor pressure. 
--Pressure transmitter can monitor the cylinder gas whether it's empty. 
--With diaphragm valve with purge function to ensure the gas purity. 
--Supply the gas contiously ( connecting cylinders in 1*1, 2*2, 3**, 4*4 )
--Will be equipped a alarm box.
WL300 Changeover Manifold For Oxygen Nitrogen Co2 With Purge Function 1

Semi-Automatic changover Reguiator With No purge Function

---Supply the gas contiously ( connecting cylinders in 1*1, 2*2, 3**, 4*4 )


Technical Parameters

SS316L, brass, nickel plated brass ( Weigh :0.9kg)  
SS316L, brass, nickel plated brass
Valve Seat
Plunger Valve Core      
Maximun Input Pressure    
500,3000 psig        
Outlet pressure range
0~25, 0~50, 0~100, 0~250, 0~500 psig  
Safety Testing Pressure
1.5 times of maximum input pressure
Working Temperature          
-40°F~ +165°F (-40°C~ +74°C )
Leakage Rate
2×10-8 atm cc/sec He
CV Value



WL3 1 1 1 S H 1 1 -N2
Series Function Options Outlet Connection Inlet Connection Body Material





Gauge Gas Option
WL300 Series Semi-automatic Changeover Device 1.With emptying, purging distribution function 1:1/4”NPT(F) 1:1/4″Weldmg S:stainless H:3000psi 1:25psi 1:MPa Blank: None
  2.Wrthout Emptying, purging distribution function 2:1/4”Tube fitting 2:1/4”NPT(M) steel M:2200psi 2:50psi 2:Bar/psi N2:nitrogen
  3.Emptying. purging distnbuUon+pressure sensor 3:3/8”NPT(F) 3:3/8”Melding C:nickel plated L:1000psi 3:100psi 3:psi/KPa O2:oxygen
  4.With pressure sensor 4:3/8”Tube fitting 4:3/8”NPT(M) brass O: Other 4:150psi 4:Other H2:hydrogen
  5:Other 5:1/2”NPT(F) 5:1/2”Melding     5:250psi   C2H2:acetylene
    6:1/2”Tube fitting 6:1/2”NPT(M)     6:Other   CH4:methane
    7:Other 7:1/4”Tube fitting         Ar:argon
      8:3/8″Tube fitting         He:helium
      9:1/2″Tube fitting         Air:air

Please provide the following parameters in your inquiry as many as possible:

1. Inlet actual working pressure

2. Outlet actual working pressure

3. Inlet conenction and size

4. Outlet conenction and size

5. Material: brass, nickel plated brass, stainless steel

6. If you have special flow rate requirements and a panel, please indicate it.

7. Quantity

Notes: The ranges of pressure gauges, inlet connector, outlet connector can be equiped according your requirements. Please write the above descriptions as possible as you can. If you can not confirmed it at the moment, just send us inquiry, we also can recommend our regular model for you.