Stainless steel forged 3 PC flange ball valve
Description
Technical Specifications
Size Range:1/2”-10”(DN15-DN250 )
Pressure Range:CLASS 150-CLASS 2500 (PN10-PN100 )
End Connection Face to face ASME B16.5, JB/T 79.1, HG/T 20592 ASME B16.10, GB/T 12221 , JB/T 1686
Temperature Range Seals-160~425 Degree celsius
Soft Seal, Metal to Metal
Operate:Lever, Gear, Pneumatic, Electric Actuator
Design Standard API6D, API608, GB/T 12237, ISO17292
Materials applicable : WCB, A105, WC6, WC9, C12A, F91, F92, CF8, F304, CF8M, F316,CF3, F304L, CF3M, F316L, CF8C, nickel alloy, etc
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The working principle of the forged steel ball valve is to make the valve open or blocked by rotating the valve stem. Usually full diameter ball valve, 90 degree Angle switch, light, small size, can be made into large caliber, reliable sealing, simple structure, easy maintenance, sealing surface and spherical surface are often in a closed state, not easy to be washed by the medium, in various industries have been widely used. Forged steel ball valve classification: low pressure forged steel ball valve, high pressure forged steel ball valve.
High pressure forged steel ball valve is based on the needs of users, in order to meet the requirements of vulcanization application cracking in the vulcanization environment, this series of high pressure forged steel ball from the design, material selection, manufacturing, testing, surface treatment and painting are strictly in accordance with the American corrosion engineers Association NACE standard requirements. Forged steel ball valve This series of ball valves not only select a wide range of materials and internal materials with uniform color surface nickel-plated 316 material, sealing ring using special polymer material. The valve is not only anti-corrosion, anti-vulcanization ability, fire, anti-static, good sealing performance, the use of pressure and temperature range, full diameter and diameter reduction complete, and can be equipped with a variety of driving devices, is the chemical industry, petroleum torch refining, natural gas extraction and transportation system ideal valve choice. Main function
When the stagnant medium in the valve cavity abnormally increases pressure due to temperature change, the medium pressure pushes the valve seat away from the ball to achieve the effect of automatic pressure relief, and the valve seat automatically resets after pressure relief.
In addition to the general sealing of the valve seat, the special sealing structure can play an emergency rescue role when the sealing ring is damaged and leakage occurs.
When fire or abnormal temperature causes the valve seat seal to burn or soften. The valve operation remained reliable, while the valve seat and the ball formed metal to metal, achieving a temporary sealing effect, preventing further expansion of the fire, in accordance with the AP16FA regulations.
Unscrew the ejector to check whether there is leakage of the valve seat, and also discharge the cavity retention to reduce the pollution of the medium on the valve side. In the working state, when the valve is fully open or fully closed, the valve stem stuffing box can be replaced.
Valve stem seal with PTFE packing and O-ring double seal, especially suitable for gas medium. The moving part of the valve stem adopts high-quality SF self-lubricating bearings, which makes the friction coefficient smaller and reduces the operating torque.
