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OEM Wafer Dual Disc Check Valve BS5153 Standard CI and DI Supplier, Suppliers
Product Description
Product Specifications
Valve Type
Wafer check valve
Structure
Double disc
Standard
BS5153
Workmanship
Investment casting
Sealing Direction
Single-directional
Sealing Grade
Zero leakage
Temperature
-20°C < T < 120°C
Operation
Self-starting
Characteristics
Adopting a clamp type structure, it can be directly clamped between two pipeline flanges without the need for additional long-distance installation space. Compared with flange connected check valves, it greatly reduces the overall space occupied by the pipeline system, especially suitable for narrow installation conditions.
Key Advantages
1. Low Fluid Resistance & Low Energy Consumption
The valve body flow channel is mostly designed with streamlined design, and the valve disc is lightweight (commonly double disc or single plate structure). The required medium thrust for opening is small, and there is less turbulence loss when the medium passes through. It can effectively reduce the operating energy consumption of upstream power equipment such as pumps and compressors, and improve the transportation efficiency of pipeline systems.
2. Sensitive Opening/Closing & Anti-Backflow
Relying on the pressure difference of the medium itself to achieve automatic opening and closing, without external driving devices. When the medium flows forward, the valve disc opens quickly; Once the medium flows back, the valve disc quickly closes under the back pressure, self weight, or spring assistance of the medium, with a fast response speed, which can effectively prevent the medium from flowing back and avoid damage caused by equipment water hammer impact or medium backflow.
3. Stable & Reliable Sealing Performance
Valve seats are often made of elastic materials (such as nitrile rubber, fluororubber) or metal hard sealing structures, which tightly adhere to the sealing surface of the valve disc. Some models adopt a dual seal design, which can adapt to the sealing requirements of different media. Whether it is low-pressure media such as clean water and sewage, or medium and high-pressure media in the petroleum and chemical fields, it can achieve good sealing and reduce the risk of leakage.
Packaging
Standard export wooden case packaging
Application Scenarios
Widely used in pipeline systems in industries such as water supply, sewage treatment, fire protection, petroleum, chemical, power, metallurgy, etc., especially in pipeline systems with limited space, it has good adaptability.
Material Specifications
| Body | Disc | Stem | Rubber gasket | Spring | ||||
|---|---|---|---|---|---|---|---|---|
| Name | Code | Name | Code | Name | Name | Code | Working temp ℃ | Name |
| Cast Iron Ductile Iron Carbon steel Stainless steel |
Z Q C P |
Plated ductile Iron Aluminum bronze ZG1Cr13Ni9Ti Stainless steel CF8M Stainless steel |
1 2 5 7 |
Stainless steel | EPDM Neoprene NBR Neoprene |
X3 X4 X5 X7 |
-46~+121 Short time -50~+150 -29~+99 Short time -35~+113 -23~+82 Short time -23~+93 -23~+150 |
Stainless steel |
Dimensions & Data Sheet
| DN | D | D1 | D2 | L | R | t | |
|---|---|---|---|---|---|---|---|
| mm | inch | ||||||
| 50 | 2" | 107 | 65 | 43.3 | 43 | 28.2 | 19 |
| 65 | 2.5" | 127 | 80 | 60.2 | 46 | 36.1 | 20 |
| 80 | 3" | 142 | 94 | 66.4 | 64 | 43.4 | 28 |
| 100 | 4" | 162 | 117 | 90.8 | 64 | 52.8 | 27 |
| 125 | 5" | 192 | 145 | 116.9 | 70 | 65.7 | 30 |
| 150 | 6" | 218 | 170 | 144.6 | 76 | 78.6 | 31 |
| 200 | 8" | 273 | 224 | 198.2 | 89 | 104.4 | 33 |
| 250 | 10" | 328 | 265 | 233.7 | 114 | 127 | 50 |
| 300 | 12" | 378 | 310 | 283.9 | 114 | 148.3 | 43 |
| 350 | 14" | 438 | 360 | 332.9 | 127 | 172.4 | 45 |
| 400 | 16" | 489 | 410 | 381.0 | 140 | 197.4 | 52 |
| 450 | 18" | 539/555 | 450 | 419.9 | 152 | 217.8 | 58 |
| 500 | 20" | 594 | 505 | 467.8 | 152 | 241 | 58 |
| 600 | 24" | 690 | 624 | 572.6 | 178 | 295.4 | 73 |
| 700 | 28" | 800 | 720 | 680 | 229 | 354 | 98 |
Frequently Asked Questions (FAQ)
What is a BS5153 Double Disc Wafer Check Valve?
It is a compact backflow prevention valve manufactured in accordance with the BS5153 standard. It features a lightweight dual-disc design clamped between pipe flanges to automatically block reverse medium flow.
How does the self-starting double disc mechanism operate?
The valve relies entirely on system fluid differential pressure. Forward flow easily pushes open the lightweight discs, while reverse flow immediately snaps the discs shut via spring force and backpressure, eliminating water hammer.
Why choose a wafer-type check valve over a flanged check valve?
Wafer check valves take up significantly less installation length and overall space. They lower fluid resistance, reduce weight, save piping installation space, and simplify overall system maintenance.
What working temperature ranges are supported?
The standard temperature rating ranges between -20°C and 120°C. Specific working temperature boundaries depend on the chosen rubber gasket material (EPDM, NBR, or Neoprene).
What sealing performance grade can be expected?
This series achieves a zero-leakage sealing grade. The elastic gasket tightly bonds with the investment cast disc to ensure absolute sealing stability across various pressure ratings.
What applications are most suitable for this valve?
It is ideal for water supply, sewage treatment, firefighting, chemical pipelines, petroleum systems, power plants, and metallurgy processing lines with tight space requirements.
