Water supply and drainage with slow close check general technical conditions of pneumatic valve (3)

and slow close check pneumatic valve of water
now standard is the following content: this standard applies to the nominal pressure PN. MPa, nominal diameter DN? Greater than mm, working temperature is not more than ℃, drinking water, raw water, industrial circulating water, water, sewage and other non corrosive medium flange connection slowly-closing check pneumatic valve working medium. Standard technical requirements are as follows: o slowly-closing check the structure of the pneumatic valve length or in accordance with relevant provisions should be GB/T flange size users agree, pneumatic butterfly valve is opened, the CD should be extended length would not be affected. Flange dimensions, sealing surface pattern should comply with GB/T. ,GB / T。 Or the requirements of GB/T. , the body of the minimum wall thickness should be consistent with GB/T, GB/T and GB/T standard. Materials. Slowly-closing check pneumatic valve pneumatic valve, pneumatic valve, pneumatic valve, Disc) , pneumatic valve shaft and other main components and materials shall be GB/T, GB/T or the requirements of GB/T. 。 Slowly-closing damper piston cylinder material should meet the needs of system pressure, piston's request, should be hard chrome on the surface of the piston rod, piston, piston rod seal stack should be clear rubber oil resistant materials such as electroplating. 。 Water and slowly check pneumatic valve closed, other metal contact with water in anti-corrosion coatings, rubber seals should use avirulent insipidity of a part of the body cavity. Five slowly-closing check pneumatic valve, closing process faster, slower close shutoff in divided into two stages, slowly closing time should be adjustable. Slowly-closing check pneumatic valve pneumatic disc check and slow the length of the piston slowly-closing totally enclosed should be adjustable. Check the check pneumatic valve slow breath moving valve ( Disc) Open and close should be flexible, no jam phenomenon. Slowly-closing device is sensitive, piston, damping when the disc ( Cd-rom) Reverse time automatically open work quickly expanded to a predetermined position, when the one-way pneumatic valve ( Disc) Close to the closed position can play a role of slowly expiration step-down. Slow damper piston cylinder device capacity should be consistent with close to adjust pneumatic valve, in order to avoid the cylinder piston damping force and the pipe is too high, hammer can harmonize consumption purposes.
external damping slowly-closing check pneumatic valve, pneumatic valve butterfly hydraulic slowly-closing device should attach importance to supervision organization damping medium level. Since the damping slowly-closing check pneumatic valve is not allowed to go into the slowly-closing device, seal and prevent blockage or solid particles, water, raw water. Type hydraulic pneumatic valve, pneumatic valve, butterfly check valve pneumatic valve slowly-closing should have a right shows the location of the CD's open institutions. Butterfly pneumatic valve hydraulic hammer or shall set up an extra battery power supply, power for automatically closed when the pneumatic valve. Connection slowly-closing device, transmission and other supporting documents should have sufficient strength and rigidity. Hydraulic equipment: standard hydraulic and electrical components should use reliable quality, good performance, long life products and related standards, should be before use for testing and qualification. Hydraulic device assembly, should be performance testing and adjusting the parameters of the match 'slowly-closing' pneumatic valve design requirements. Slowly-closing check pneumatic valve outside the paint, the color should be uniform, appearance should level off, should not have any scars, sagging, foaming and obvious cracks. This site keywords: pneumatic ball valve pneumatic ball valve pneumatic pneumatic valve pneumatic pneumatic valve pneumatic butterfly valve pneumatic butterfly valve pneumatic actuator pneumatic of board