Posts Tagged ‘Valve’
VALVE TEST STANDARDS
February 1st, 2018 by Amanda Schumann
Main Valve Test Standards API 598 Valve Inspection and Test The most widely used test specification in the world. The standard covers all types of valves (soft & metal seated) in sizes up to 600NB (NPS 24). It also includes leakage rates and testing criteria for metal-seated and resilient seated valves. API6D Pipeline Valves Test […]
Self Relieving vs Double Piston Effect Seals on Ball Valves
December 20th, 2017 by Amanda Schumann
API6D trunnion mounted ball valves with single piston effect seats (SPE) are designed to automatically release cavity over-pressure into the pipeline automatically using “self relieving seats”. Since body cavity and pipeline are isolated in the fully open and fully closed position, pressure trapped in the body cavity may be different than pressure in the line. […]
Starline Welded Ball Valves for Gas Storage
December 13th, 2017 by Amanda Schumann
One piece seal welded body, floating ball double block. Primary seal METAL, to METAL, secondary seal vulcanized specially hardened Viton or NBR, pressure safe cover for the stem to prevent any leakage. For operation remove the cover. Completely in accordance to spec. KN251-005. Specifically designed as shut off drain and vent lines for larges valve […]
Sample of F51 Valve & Actuator Supplied from stock
June 1st, 2017 by Amanda Schumann
Sferova F51 TM ESDV Ball Valve (Norsok certified o-rings) c/w Air Torque heavy duty SIL3 certified, EX certified, heavy wall, low weight, Alloy, rugged heavy wall rack & pinion, high torque, 100% Italian made, spring return actuator & controls. Supplied, fitted & tested by Global Supply Line Engineering in our Sferova & Air Torque approved […]
Consider ENP Trim Ball Valve where 316 trim is specified
May 10th, 2017 by Amanda Schumann
In floating ball valves 316 (CF8M ball) trim is the standard because under 150mm there is only a minimal cost advantage using ENP trim in 150/300 class as the ball wall thickness is not large and the balls are mass produced keeping the costs down. However, in the trunnion mounted arena 316 trim is utilised […]