Design in accordance with API 602
Flanged RF / RTJ, socket weld, threaded or combined
Bolted bonnet or welded bonnet options
Renewable or integral seats
Low fugitive emissions control
NACE Service either MR-0175 or MR-0103
Test in accordance with API-598
Forged carbon steel A105
Low alloy steel ASTM A182 gr. F1, F11 and F22
Medium alloy steels ASTM A182 gr. F5, F9, and F91
Stainless steel ASTM A 182 gr. F304/304L, F316/316L, F321, F347, F348
Duplex Stainless Steel ASTM A 182 gr. F44 (6Mo), F51, F53 or F55 (superduplex)
High nickel molybdenum alloys (alloy 20, inconel, monel)
NPS: 1/4'' - 2"
Pressure rating: ANSI 150 - 2500#
Body and Bonnet Connection
The body and bonnet of Class 150~Class 900 gate valves are usually bolted bonnet design. And Class 1500~Class 2500 gate valves are usually of pressurized seal design.
Gasket of Cover Flange
Carbon steel or stainless steel+flexible graphite combined gasket is used for Class 150 gate valve; Stainless steel+flexible graphite wounded gasket is used for Class 300 gate valve; Stainless steel+flexible graphite wounded gasket is used for Class 600 gate valve, and ring joint gasket is also optional for Class 600 gate valve; Ring Joint gasket is used for Class 900 gate valve; Pressurized seal design is used for Class 1500~Class 2500 gate valve.
For carbon steel gate valve, the seat is usually forged steel. The sealing surface of the seat is spray welded with hard alloy specified by the customer. Welded seat is used for NPS Contact us if you need more details on Gate Valve. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Check Valve、Industrial Valve. If these products fail to match your need, please contact us and we would like to provide relevant information.