Name:
Cast steel Piston Control Check Valves
On Line Service:
Print this Page | Bookmark this |
Skype Online | E-mail Us |
Live Messenger | PDF Download |
【Previous Products】 | 【Next Products】 |
A piston check valve is essentially a lift check valve. It has a dashpot consisting of a piston and cylinder that provides a cushioning effect during operation. Because of the similarity in design to lift check valves, the flow characteristics through a piston check valve are essentially the same as through a lift check valve. Installation is the same as for a lift check in that the flow
must enter from under the seat. Construction of the seat and disk of a piston check valve is the same as for lift check valves. Piston check valves are used primarily in conjunction with globe and angle valves in piping systems experiencing very frequent changes in flow direction. Valves of this type are used on water, steam, and air systems.
Product Arrange
Size:1"-24", Class:150# ~ 2500#
Features
For class 900 valves, a ring joint bonnet gasket assures positive seal against leakage and accurate alignment of moving parts Seat ring is threaded into the body for 6" or below to carry out a renewable feature. Seat ring is seal welded for 8" or above to eliminate leak path.
Basic Standards These valves comply with the applicable requirements of the following standards:
API 598
API RP591
ASME B16.34
ASME B16.25
ASME B16.10
ASME B16.5
Inspection Policy for TOPS valve
Every TOPS cast steel valve is subjected to a 100% pressure test according to API 598 requirements. Manufacturer's material test reports and Inspection and Test Certifications are available upon request. Some of the additional inspections and tests performed are: Random Radiograph Inspection of Body and Bonnet Castings to ASME B16.34 Appendix B Random Chemical Composition and Mechanical Properties Verification of Fasteners to ASTM A-193/A-194
Liquid Penetrate Inspection of Seat Rings
Visual Inspection of Casting to MSS-SP-55
Receiving, In-Process, and Final Dimensional Inspections to Relevant Valve Standards Other inspections or tests can be performed or evaluation criteria applied when specified by the customer
If you have any enquiry about quotation or cooperation, please feel free to email us at sale@tops-valve.com or use
the following enquiry form. Our sales representative will contact you within 24 hours. Thank you for your interest in our products.
Contact: | * | |
Phone: | * | |
Fax: | ||
CompanyName: | ||
Address: | ||
Email: | * | |
Subject: | * | |
Message: | * | |