CHK-8SV Check Valve

1/2" Female NPT Ozone resistant stainless steel check valve using viton seal.  Simple check valve is rebuildable and extremely reliable.  Female NPT connections on inlet and outlet.

9 In Stock

Stainless Steel check valve with Viton seal. 

Spring-loaded check valve with 2.5 PSI crack pressure for positive seal, yet allows a high flow of ozone gas.  All stainless steel body with stainless steel spring and plunger.  Viton 0-ring used for sealing.



     -Working pressure = 1500 PSI

     -Working Temperature = -10 - 105-deg C

     -Crack pressure = 2.5 PSI

     -Threaded ends = Female NPT



     -Body = 316 Stainless Steel

     -O-Ring = Viton

     -Spring = 304 Stainless Steel

     -Cap = 316 Stainless Steel

     -Spool = 316 Stainless Steel

     -Snap Ring = 304 Stainless Steel

 Ozone resistant check valve

See image above

This check valve is completely serviceable and rebuildable.  The only sealing material is a Viton O-ring.  This O-ring is easily replaceable is ever necessary.  The body is one piece and requires no seal for the body.  Only the O-ring is a sealing surface.  This makes the CHK-SV check valve the most reliable check valve over the long term.




Part # Size Body Length Body Diameter Weight
CHK-4SV 1/4" 2.165" 0.75" 0.176 lbs
CHK-6SV 3/8" 2.165" 0.866" 0.22 lbs
CHK-8SV 1/2" 2.165" 1.063" 0.286 lbs
CHK-12SV 3/4" 2.677" 1.417" 0.638"
CHK-16SV 1" 3.268" 1.693" 1.056 lbs


Common Uses:

     -Ozone gas backflow prevention

     -Isolation ozone from an oxygen concentrator

     -Prevention of water damage to an ozone generator

     -Used directly on Mazzei Venturi (see below)


We use this venturi directly on the Mazzei venturi.  The standard check valve supplied with a Mazzei venturi is made out of Kynar material and does not always create a leak-proof connection and may leak water slowly past the seal in many situations.  By removing the stock check valve and threading this check valve directly on the Mazzei venturi, a more secure connection is possible with stainless fittings, and a positive check valve with a positive seal is used.

Check valve used on venturi


Venturi Size
Gas Connection
Check Valve
3/4" Venturi 3/8" CHK-6SV
1" Venturi 3/4" CHK-12SV
1.5" Venturi 3/4" CHK-12SV
More Information
Manufacturer Oxidation Technologies
Quickbooks Stock Level 9.000000
Call For Price No
Max Pressure 1500 PSI
Operational Temperature Range -10 - 150-deg C
Material of construction Stainless Steel
Lead Time In Stock
Dimensions (LxWxH) See chart
Size 1/2"
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