300X Slow Closing Check Valve

3/4″~24″ (20~600mm)
Iron, Steel, S.S.

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300X Slow Closing Check Valve Descriptions

300X slow closing check valve is one type of intelligent valve which is applicable to pump outlet of the high buildings water supply system and other water supply system to prevent of fluids back flow and water hammer. The valve combines three functions, including electric valve, non-return valve and water hammer eliminator, so it can improve effectively the water supply system safety and reliability. 300X diaphragm type slow close check valve integrates slow opening, slow closing and water hammer eliminating technical principles to prevent of pump start water hammer and pump stop water hammer. Just only needing operate the pump motor open and close button to achieve automatically the valve open and close according to the pump operating instructions. It has big flow but less pressure loss.
Flowspec Luokai can manufacture and supply the 300X slow closing check valve mounted on the pipeline sizes≤DN600mm.


  • Convenient installation and adjustment
  • Stable, safe and reliable performance
  • Long service life


  • Design & manufacturing: Q/FSF-2014
  • Face to face: Q/FSL-2014
  • Flanged ends: GB/T 17241.6, GB/T 9113, ASME B16.1 / B16.5, DIN2532-2534, DIN2542-2544
  • Inspection & testing: GB/T 13927, API 598
  • Quality assurance: ISO 90001


  • Nominal pressure: ANSI 125/150LB, PN1.0/PN1.6MPa/PN2.5MPa
  • Size: 3/4″~24″ (DN20~DN600mm)
  • Materials: cast iron (GG25, ASTM A126 B), ductile iron (GGG50, GJS500, DIN1693, BS EN1563, ASTM A536 65-45-12), carbon steel (WCB), stainless steel 304 (CF8), stainless steel 316 (CF8M), brass, bronze (C83600, C95800)
  • Applicable medium: water, sewage, sea water
  • Applicable temperature: 0℃~+80℃ (higher temperature is available upon request)


  • Water projects
  • High buildings
  • Water treatment industry
  • Power plant
  • Chemical industry

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