Straight-Sided Insert Check Valve Style – SI

The Straight Sided Insert (SI) is a thread less check valve designed to be inserted into any cavity where a check valve is needed and threads are not desired. The SI inline check valve can be used as a low-pressure relief valve or vacuum breaker by using the desired spring settings.

PED Compliance Statement: Due to the unique “insert” design of our 3S, SC, CB, TC, SI, & UV, style check valves, they do not constitute an “identifiable pressure bearing housing” as defined in PED Guideline 1/8. These styles must be installed into either ferrules or fittings to create a pressure bearing housing. Instead, they are classified as “components of pressure equipment” as defined in PED Guideline 1/8. As a result, these valves can be sold in the European Community and no CE Mark is required.

In addition applicaitons where the maximum allowed oerating pressure is 0.5 bar (7.2 psi) or less, do not fall under the PED, regardless of the valve style.

For additional information about Check Valves

What is a Silent Check Valve?
What is a Spring Loaded Check Valve?
What is a Poppet Check Valve?
What is an Inline Check Valves?