300X Slow Closing Check Valve

PN16-PN25
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.

1. FEATURES

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

3. STANDARDS

  • 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

2. TECHNICAL SPECIFICATIONS

  • 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)

4. APPLICATIONS

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

Why Choose Flowspec Luokai

45+ Years Experience

Founded in 1978, manufacturing industrial valves for over four decades with proven reliability worldwide.

Global Certifications

ISO 9001, CE/PED, WRAS, FM, UL, API approved — compliant with international quality and safety standards.

OEM Custom Solutions

Flexible design and manufacturing per your specifications — material, size, pressure, actuation tailored to project needs.

Worldwide Delivery

Exported to 5 continents — North & South America, Europe, Middle East, Southeast Asia, and Africa.

Our Service Promise

Strict Quality Control

Every valve tested to API 598, EN 12266 before shipment

Timely Global Delivery

Reliable logistics to 5 continents with secure packaging

OEM & Custom Design

Tailored material, size, pressure and actuation to your specs

Dedicated After-Sales

Technical support and service throughout product lifecycle

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