Our JIS 5K wafer duo check valve is a spring-loaded, dual plate, wafer type non-return valve designed for installation between JIS 5K flanges. It is widely used to prevent reverse flow in pipelines carrying water, seawater, fuel oil, lube oil, compressed air, and other compatible fluids.

The valve features a short face-to-face dimension, lightweight construction, non-slam closing, and excellent sealing performance. It can be installed horizontally or vertically, making it a cost-effective and space-saving solution for marine and industrial applications.

As a professional China JIS 5K wafer duo check valve manufacturer and exporter, we supply standard and customized valves with competitive factory prices, fast delivery, and full technical support.

Key Features

• Wafer type design: Fits directly between JIS 5K flanges, saving space and reducing installation cost

• Dual plate / double door structure: Lightweight, quick closing, low pressure drop

• Spring-loaded non-slam closing: Reduces water hammer and protects pipeline equipment

• Short face-to-face length: Compact design for easy installation in narrow spaces

• Flexible installation: Can be mounted horizontally or vertically without modification

• Multiple material options: Cast iron, ductile iron, cast steel, stainless steel, bronze, aluminum bronze

• Seat options: EPDM, NBR, Viton, PTFE, metal-to-metal

• Reliable sealing: Leakage rate conforming to API 598 / ISO 5208 / JIS B 2003

• Corrosion resistant coating: Epoxy paint or hot-dip galvanizing available for marine environment

Applications

• Marine engine room seawater and freshwater piping

• Ship ballast and bilge systems

• Fuel oil and lube oil transfer systems

• Fire protection systems

• HVAC chilled water and cooling water lines

• Water treatment plants and pumping stations

• Power plant auxiliary systems

• Offshore platforms and FPSO process piping

• Chemical and petrochemical pipelines

Compliance & Standards

Our JIS 5K wafer duo check valve is designed, manufactured, and tested with reference to or in compliance with the following standards:

• JIS B 2220 — Steel pipe flanges (5K, 10K)

• JIS B 2239 — Cast iron pipe flanges

• JIS B 2031 / JIS B 2032 — Cast iron / Ductile iron valves

• JIS B 2051 — Cast steel valves

• JIS B 2003 — Valve inspection and testing

• API 594 — Check valves: flanged, lug, wafer, and butt-welding

• ISO 5752 — Face-to-face dimensions

• ISO 5208 / EN 12266 — Pressure testing

Optional certificates available on request:

• EN 10204 3.1 / 3.2 material certificates

• Classification society certificates: NK, DNV, ABS, LR, BV, KR, CCS

• Third-party inspection: SGS, BV, TUV

Product Specifications

Why Choose Us

• 17+ years export experience in marine valves and industrial pipeline products

• Strict quality control: 100% dimensional inspection, pressure test, seat leakage test, appearance check

• OEM / ODM service: Custom material, size, seat, marking, painting, and packing

• Seaworthy packaging: Plywood case, carton, pallet, with full export documentation

• Technical support: Help you select the correct material and seat based on fluid, pressure, and temperature

• Competitive factory price: Direct from manufacturer, no middleman cost

Ordering Information

To get an accurate quotation, please provide the following information:

1. Size: DN40 / DN50 / DN65 / DN80 / DN100 / DN125 / DN150 / DN200 / DN250 / DN300 / DN350 / DN400 / DN450 / DN500 / DN600 or other

2. Body material: Cast iron / Ductile iron / Cast steel / Stainless steel / Bronze

3. Seat material: EPDM / NBR / Viton / PTFE / Metal

4. Working medium: Water / seawater / oil / air / steam / chemical

5. Working pressure and temperature

6. Quantity required

7. Required certificates: EN 10204 3.1 / 3.2 / NK / DNV / ABS / LR / BV / KR / CCS

You can send drawings in PDF, DWG, or JPG format for customized requirements.