Page 8 of Gate Valve Manufacturer, Industrial Gate Valves Supplier China

Gate Valve

The ANSI gate valves provided by Weldon in this section mainly follow the normative dimensions and pressure classes from American Petroleum Institute (API) and American National Standards Institute (ANSI), including API 600, API 6D, ASME B16.34, ASME B 16.5, ASME B16.10, ect.

API 600 gate valve from Weldon covers bolted bonnet steel gate valves for the petroleum and natural gas industries, is the primary purchase specification of steel gate valveANSI Gate valves design and construction criteria are detailed, as well as materials and trim designations.

API 6D valves from Weldon cover ball valves, check valves, gate valves for pressure ratings up to Class 2500, is the primary standard for valves used in pipeline service, Occasionally refinery and petrochemical purchasers will reference the more stringent testing requirements of API 6D.
Weldon DIN gate valves are applicable to the cutting and connection of pipelines medium that are used in various industries such as petroleum, chemical industry, pharmacy, electric power station, etc. Pressure of PN1.6-16 Mpa and working temperature range -100 ℃ - 600 ℃. The DIN gate valves are typical wedge gate valves designed and manufactured to German DIN 3352 standards covering materials of cast iron, carbon steel, stainless steel, Alloy steel, etc. OS & York, Rising stem gate valves and nor-rising stem gate valves are both available. 

Main features:
Logical structure, reliable seal, excellent performance and design.
Seal surface built up with welding hard alloy.
Stem surface tread by nitriding treatment.
More reliable double seal capability.
The Pressure seal bonnet (PSB) gate valves provided by Weldon are adopted for high pressure service. Compared to Bolted Bonnet (BB) valve, which the body flange and bonnet flange are joined by studs and nuts, when the system pressure increases, the potential for leakage through the body/Bonnet joint also increases, the unique structure of the pressure seal Bonnet gate valves is that the body-Bonnet joints seals improves as the internal pressure in the gate valve increases, the higher the internal pressure, the greater the sealing force.

Weldon pressure seal gate valves are available in size ranges from 2 inches to 24 inches, and pressure classes from Class 600 to Class 2500 LB.