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Custom Ductile iron swing check valve EPDM seal drink water pipeline Supplier, Factories
Product Description
Description
Material
Dimension
| Valve Type: | Swing check valve | Structure: | Swing type |
| Standard: | API609 | Workmanship: | Investment casting |
| Sealing direction: | Single-directional | Sealing grade: | Zero leakage |
| Temperature: | -20°C < T < 120°C | Operation: | Self-starting |
Characteristics
The swing check valve adopts EPDM soft seal for reliable tight shutoff and anti-backflow performance. Swing disc structure brings large flow area and low pressure loss, reducing water hammer impact. Widely used in water supply, fire fighting, HVAC and general clean fluid pipelines to prevent medium reverse flow automatically.
Advantages
Durable Body Construction: GGG40 ductile iron owns high toughness and impact resistance. Epoxy coating avoids rust, stable pressure bearing and longer service life.
Superior EPDM Seal: EPDM rubber seal features great elasticity and aging resistance, tightly fitting the seat to achieve reliable tight shutoff under variable pressure.
Low Resistance Flow Design: Swing disc design provides large flow passage and low flow resistance, effectively reducing water hammer to protect pipeline equipment.
Packing
Standard export wooden case packaging
Application Scenarios
This non-return valve swing type is widely used in municipal water supply pipelines, HVAC circulating water, fire protection systems, sewage treatment, residential irrigation and heat exchange projects.
Material Specifications
| Product Type | Part Name | |||
| Valve Body, Valve Bonnet | Valve Disc, Valve Seat | Gasket | Fastener | |
| H44HY | WCB / 25 | H: 25 + Chromium stainless steel Y: 25 + Carbide |
Stainless steel with flexible graphite Steel strip / Asbestos-wound gasket Spiral wound gasket |
High quality carbon steel |
| H44Y | Chromium-molybdenum steel | Chrome molybdenum steel + Carbide | Alloy steel | |
| H44W | Chrome-nickel titanium, chromium-nickel-molybdenum and titanium stainless steel | Stainless steel | ||
| H44W | ||||
Dimension Reference
| PN (MPa) | DN (mm) | L | H | D | D1 | D2 | D6 | b | f | f2 | Z- ϕ d |
| 1.6 | 50 | 230 | 135 | 160 | 125 | 100 | – | 16 | 3 | – | 4- Φ18 |
| 65 | 290 | 142 | 180 | 145 | 120 | – | 18 | 3 | – | 4- Φ18 | |
| 80 | 310 | 165 | 195 | 160 | 135 | – | 20 | 3 | – | 8- Φ18 | |
| 100 | 350 | 180 | 215 | 180 | 155 | – | 20 | 3 | – | 8- Φ18 | |
| 125 | 400 | 210 | 245 | 210 | 185 | – | 22 | 3 | – | 8- Φ18 | |
| 150 | 480 | 233 | 280 | 240 | 210 | – | 24 | 3 | – | 8- Φ23 | |
| 200 | 550 | 304 | 335 | 295 | 265 | – | 26 | 3 | – | 12- Φ23 | |
| 250 | 650 | 348 | 405 | 355 | 320 | – | 30 | 3 | – | 12- Φ25 | |
| 300 | 750 | 390 | 460 | 410 | 375 | – | 30 | 4 | – | 12- Φ25 | |
| 350 | 850 | 430 | 520 | 470 | 435 | – | 34 | 4 | – | 16- Φ25 | |
| 400 | 950 | 468 | 580 | 525 | 485 | – | 36 | 4 | – | 16- Φ30 | |
| 450 | 1050 | 490 | 640 | 585 | 545 | – | 40 | 4 | – | 20- Φ30 | |
| 500 | 1150 | 525 | 705 | 650 | 608 | – | 44 | 4 | – | 20- Φ34 | |
| 600 | 1350 | 610 | 840 | 770 | 718 | – | 48 | 4 | – | 20- Φ41 | |
| 700 | 1450 | 670 | 910 | 840 | 788 | – | 50 | 4 | – | 24- Φ41 | |
| 800 | 1650 | 730 | 1020 | 950 | 898 | – | 52 | 4 | – | 24- Φ41 | |
| 900 | 1950 | 795 | 1120 | 1050 | 998 | – | 54 | 4 | – | 28- Φ41 | |
| 2.5 | 50 | 230 | 160 | 160 | 125 | 100 | – | 20 | 3 | – | 4- Φ18 |
| 65 | 290 | 175 | 180 | 145 | 120 | – | 22 | 3 | – | 8- Φ18 | |
| 80 | 310 | 185 | 195 | 160 | 135 | – | 22 | 3 | – | 8- Φ18 | |
| 100 | 350 | 220 | 230 | 190 | 160 | – | 24 | 3 | – | 8- Φ23 | |
| 125 | 400 | 248 | 270 | 220 | 188 | – | 28 | 3 | – | 8- Φ25 | |
| 150 | 480 | 270 | 300 | 250 | 218 | – | 30 | 3 | – | 8- Φ25 | |
| 200 | 550 | 350 | 360 | 310 | 278 | – | 34 | 3 | – | 12- Φ25 | |
| 250 | 650 | 410 | 425 | 370 | 332 | – | 36 | 3 | – | 12- Φ30 | |
| 300 | 750 | 430 | 485 | 430 | 390 | – | 40 | 4 | – | 16- Φ30 | |
| 350 | 850 | 518 | 550 | 490 | 448 | – | 44 | 4 | – | 16- Φ34 | |
| 400 | 950 | 560 | 610 | 550 | 505 | – | 48 | 4 | – | 16- Φ34 | |
| 450 | 1050 | 590 | 660 | 600 | 555 | – | 50 | 4 | – | 20- Φ34 | |
| 500 | 1150 | 618 | 730 | 660 | 610 | – | 52 | 4 | – | 20- Φ41 | |
| 600 | 1350 | 640 | 840 | 770 | 718 | – | 56 | 4 | – | 20- Φ41 | |
| 700 | 1450 | 695 | 955 | 875 | 815 | – | 60 | 4 | – | 24- Φ48 | |
| 800 | 1650 | 760 | 1070 | 990 | 930 | – | 64 | 4 | – | 24- Φ48 | |
| 900 | 1956 | 833 | 1180 | 1090 | 1025 | – | 66 | 4 | – | 28- Φ54 |
Frequently Asked Questions (FAQ)
Q: What is the primary function of a swing check valve?
A swing check valve automatically prevents backflow in fluid systems. Its self-starting swing disc opens under forward pressure and shuts tight under reverse flow, protecting pumps and upstream equipment.
Q: What are the advantages of GGG40 ductile iron for valve bodies?
GGG40 ductile iron delivers superior tensile strength, toughness, and impact resistance compared to standard cast iron, providing high pressure rating stability and longer service life under demanding pipeline conditions.
Q: Why choose an EPDM soft seal over a metal seal?
EPDM soft seals offer excellent elasticity, chemical resistance, and aging resistance. They ensure zero-leakage tight shutoff under variable operating pressures and clean water applications.
Q: Can this swing check valve be installed horizontally or vertically?
It is primarily designed for horizontal pipeline installation. When installing vertically, ensure the fluid flow direction is vertically upwards so gravity aids disc closure properly.
Q: How does the swing disc design reduce pressure loss and water hammer?
The swing disc swings entirely out of the flow path when fully open, creating a full-bore flow area with minimal pressure drop and reducing destructive water hammer effects during fluid reversal.
