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Valves for high pressure hydrogenation system
Hydrogenation technology for petroleum is an important process in petroleum products, modified and heavy oil processing. It not only can improve the depth of secondary process for crude oil and the recovery rate of light hydrocarbon, but also increase the quality of fuel oil and reduce the enviro...Read more -
Operation and Maintenance Manual of Gate Valves
1. General This type of valve is designed to be an open-and-shut installation to keep the proper operation used in industrial pipeline system. 2. Product Description 2.1 Technical requirement 2.1.1 Design and Manufacture Standard：API 600、API 602 2.1.2 Connection Dime...Read more -
Operation and Maintenance Manual of Check Valves
1. Scope The DN ranges includes DN15mm~600mm(1/2”~24”) and PN ranges from PN1.6MPa~20MPa(ANSI CLASS150~1500) threaded, flanged, BW and SW swing and lifting check valve. 2.Usage: 2.1 This valve is to prevent medium flows backwards in pipe system. 2.2 Valve material is sel...Read more -
Operation and Maintenance Manual of Cast Steel Gate Valves
1. General Valves of this series are used to close or open pipelines in pipeline system so as to maintain normal operation of the system. 2. Product Description 2.1Technique requirement 2.1.1 Design and manufacture: API600、API603、ASME B16.34、BS1414 2.1.2 Connection end dimension：ASME B16.5、A...Read more -
Operation and Maintenance Manual of API 6D SLAB GATE VALVE
1. Gate valve maintenance 1.1 The main technical parameters: DN：NPS1”~ NPS28” PN：CL150~CL2500 Material of main parts: ASTM A216 WCB Stem—ASTM A276 410; Seat—ASTM A276 410; Sealing face—VTION 1.2 Applicable Codes and Standards： API 6A、API 6D 1.3 The structural of valve (see Fig.1) Fig.1 ...Read more -
Metal material comparison table
Type No. China Japan International standard America England Germany GB1220 GB1221 GB12228 GB12229 GB12230 JIS ISO683/13 ISO683/16 ANSI ASTM BS970 BS1449 DIN17440 DIN17224 Cast carbon steel alloy steel 1 WCA G5151 SCPH1 A216 WCA 161Cr-430F GS-C25...Read more -
Installation, Operation and Maintenance Manual–Triple Electric Butterfly Valves
1. Scope The specification includes Normal Diameter NPS 10~NPS48, Normal Pressure Class (150LB～300LB) flanged triple eccentric metal seal butterfly valves. 2. Product Description 2.1 Technical requirements 2.1.1 Design and Manufacture standard：API 609 2.1.2 End to end connection standard：ASME ...Read more -
Installation, Operation and Maintenance Manual of ASME Ball Valve
1. Scope This manual includes electric operated, pneumatic operated, hydraulic operated and oil-gas operated flanged connection three-piece forged trunnion ball valves and fully welded ball valves with nominal size NPS 8~36 & Class 300~2500. 2. Product Description 2.1 Technical requirements 2...Read more -
Installation and maintenance guide of Steam Trap Valves
1． Parameter Design Design Standards：GB/T13927-2008 Flange：GB/T9113-GB/T9124 JB/T79.1-79.4 HG20592-20635 ASME B16.5 ASME B16.47 Screw thread：GB/T7505 55° GB/T12716 60° BSP British pipe thread NPT American pipe thread Structure Length：GB/T12250 Or customers Test test：GB/T12251 Shell ...Read more -
New Competitive Products
Partnering with Tianjin Better valve, CONVISTA has launched a new product line— its self-operated safety shut-off valve and pressure regulating valve series. This series of valves is very competitive and can be applied to gas transmission station of long-distance pipeline, city gas pressure regul...Read more
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