Smith Reverse Flow Check Valves


Reverse flow check valves are an important part of any oxy/fuel system.  Without check valves, reverse flow of oxygen and fuel gases can occur when a tip becomes clogged, or when one cylinder empties during use allowing the higher pressure gas to back up into the other hose and into the regulator, thereby creating conditions which could lead to a regulator explosion.  Smith's reverse flow check valves close automatically when outlet pressures drop below 1/2 PSIG, preventing reverse flow of gases.
Smith Reverse Flow Check Valves Available In 3 Styles.

  • H693A and H694A are installed in the regulator body after first removing the regulator outlet fitting.
  • H691B, H692B and H698 are attached directly to the existing regulator outlet fitting.
  • H695, H696 and H697 check valves are attached directly to torch handle.

H692B
Attach to Regulator Outlet Fitting

H693A
Installed in Regulator Body

H695
Attach To Torch Handle


Buy
Price
Stock
No.
Gas
Used
Inlet
Connection
Outlet
Connection
Reg.
Mount
Torch
Mount
$10.50
H693A
Oxygen
1/4" NPT External
9/16"-18 RH External
Yes
No
$10.50
H694A
Fuel Gas
1/4" NPT External
9/16"-18 LH External
Yes
No
$8.00
H691B
Oxygen
9/16"-18 RH Internal
9/16"-18 RH External
Yes
No
$8.00
H692B
Fuel Gas
9/16"-18 LH Internal
9/16"-18 LH External
Yes
No
$15.00
H698
Pair
9/16"-18 LH & RH Internal
9/16"-18 LH & RH External
Yes
No
$6.00
H695
Oxygen
9/16"-18 RH External
9/16"-18 RH Internal
No
Yes
$6.00
H696
Fuel Gas
9/16"-18 LH External
9/16"-18 LH Internal
No
Yes
$11.00
H697
Pair
9/16"-18 LH & RH External
9/16"-18 LH & RH Internal
No
Yes




On orders over $200.00.
CONUS, Standard Ground Shipping
Orders may take up to 5 days to ship.
Prices are subject to change.
All products subject to availability.

Last update 1 Jan 2010