Low-pressure relief valve H900SSL1/4SL

standardback pressure

• - Service 10-225 psi • - MAWP* 300 psi • - One spring for ail set pressure range • - Availabié in ail pipe threads and LET-LOK* connections • - Option to comply with standards CE/PED • - Maximum Allowable Wortong Pressure. GENERAL The H-900 senes ts a relief valve designed for low pressure services. It is most suited for use where changes in pressure can cause process issues. System damage or Personal injury. CLEANING & PACKAGING Every H-900 sériés relief valve is cleaned in accordance with Standard Cleaning and Packaging Procedure 8184. Oxygen Clean & Lubricant-Free cleaning and Packaging is conducted in accordance with Spécial Cleaning and Packaging Procedure 8185. TESTING The H-900 relief valve designs hâve been tested for proof and burst. Every H-900 relief valve is factory tested for proper assembly. set and resealing performance. No détectable leakage is allowed during the Shell test. SETTING AND RESEALING PRESSURE ■ - Upstream set pressure is the first indicator of flow process. Every pressure relief after the first indication is repeatable within a déviation of 5% at room température. ■ - Blocked upstream set pressure is the first indicator of a stopped flow process and is aiways lower than the set pressure. ■ - Calculation of set pressure valve design demands back pressure considération as the System back pressure increases the set pressure. To balance the System, the back pressure must be multiplied by 0.8 and the resuit shall be subtracted from the required set pressure. ■ - Lubricant-Free cleaned valves hâve higher reseal pressure.