Ductile Iron Gate Valve - GGG50, BS5163, PN16
Ductile Iron Gate Valve features a resilient wedge design for superior sealing performance in water, wastewater, and industrial applications. Manufactured from high-grade ductile iron GGG50 and rated for PN16 pressure, this valve ensures durability, leak-proof operation, and long service life.
Ductile iron GGG50 offers excellent strength and corrosion resistance, making it an ideal choice for water supply, wastewater treatment, and industrial pipeline systems where durability and reliable sealing are essential.
Key Features
• Body Material: GGG50 Ductile Iron - High strength & corrosion resistance
• Wedge Type: Resilient Rubber-Seated Wedge - Bubble-tight shut-off, low torque operation
• Pressure Rating: PN16 (16 bar) - Suitable for medium-pressure systems
• Connection: Flanged - Easy installation & maintenance
• Operation: Manual Handwheel - Reliable and simple control
• Standards Compliance: BS5150, BS5163
✓ Resilient rubber-seated wedge ensures bubble-tight sealing at PN16 pressure rating
Technical Specifications
| Parameter | Specification |
|---|---|
| Body Material | GGG50 Ductile Iron |
| Wedge Material | Ductile Iron + EPDM/NBR |
| Seal Type | Resilient Rubber |
| Pressure Class | PN16 (16 bar) |
| Connection Type | Flanged |
| Operation | Manual (Handwheel) |
| Temperature Range | -10°C to +120°C (EPDM) |
| Size Range | DN50 to DN600 (2″ to 24″) |
| Standards | ISO 5208, BS5150, BS5163 |
Reference: BS5150, BS5163, ISO 5208. Test pressure per BS EN 1074: Shell test 1.5 × PN, Seat test 1.1 × PN.
Ductile Iron GGG50 vs GGG40 vs Grey Cast Iron: Material Comparison
| Grade | Standard | Tensile Strength | Elongation | Typical Application |
|---|---|---|---|---|
| GGG50 (EN-GJS-500-7) | DIN EN 1563 | ≥ 500 MPa | ≥ 7% | High-strength valve bodies, pressure pipes |
| GGG40 (EN-GJS-400-15) | DIN EN 1563 | ≥ 400 MPa | ≥ 15% | General valve bodies, ductile iron pipes |
| Grey Cast Iron | ASTM A126 / DIN 1691 | 150–300 MPa | < 1% | Low-pressure water, non-critical service |
Reference: DIN EN 1563. GGG50 offers significantly higher tensile strength and elongation than grey cast iron, providing better pressure containment and impact resistance.
Structural Length Dimensions (BS5163 Standard)
| Nominal Size (DN) | Face to Face (mm) | Nominal Size (DN) | Face to Face (mm) |
|---|---|---|---|
| 50 | 178 | 250 | 330 |
| 65 | 190 | 300 | 356 |
| 80 | 203 | 350 | 381 |
| 100 | 229 | 400 | 406 |
| 125 | 254 | 450 | 432 |
| 150 | 267 | 500 | 457 |
| 200 | 292 | 600 | 508 |
Reference: BS5163, BS EN 558 Series 3. Dimensions may vary by manufacturer. Contact us for confirmed drawing and quotation.
Why Choose Our Resilient Wedge Gate Valve?
• Leak-Proof Performance — Rubber-seated wedge ensures tight sealing even after repeated use.
• Low Operating Torque — Smooth handwheel operation reduces wear.
• Corrosion-Resistant — GGG50 body with optional epoxy coating for harsh environments.
• Wide Applications — Ideal for water supply, fire protection, and industrial pipelines.
Applications
• Water & Wastewater Treatment: municipal water supply, distribution networks, and wastewater treatment plants.
• Firefighting Systems: fire main lines and sprinkler systems requiring reliable on-off isolation.
• HVAC & Industrial Piping: heating, ventilation, air conditioning, and general industrial pipeline systems.
• Irrigation & Drainage Networks: agricultural irrigation and stormwater drainage pipelines.
• Potable Water Service: WRAS-approved elastomer and fusion bonded epoxy coating available for drinking water applications.
FAQ - Ductile Iron GGG50 Resilient Wedge Gate Valve
Q1: What is a resilient wedge gate valve?
A: A resilient wedge gate valve is a type of gate valve that uses a rubber-coated wedge (disc) to create a bubble-tight seal against the valve body. The resilient rubber seating ensures leak-proof performance even after repeated operation. It is designed for on-off isolation service in water, wastewater, and industrial pipeline systems, and is manufactured to BS5163 with PN16 pressure rating.
Q2: What is GGG50 ductile iron?
A: GGG50 (EN-GJS-500-7) is a European standard ductile cast iron grade with a minimum tensile strength of 500 MPa, minimum yield strength of 320 MPa, and minimum elongation of 7%. It offers significantly higher strength and impact resistance than grey cast iron, making it ideal for pressure-containing valve bodies in water and wastewater service. The "GGG" designation is the German DIN 1693 equivalent of EN-GJS-500-7.
Q3: What is the difference between PN10 and PN16 gate valves?
A: PN16 (16 bar) gate valves have thicker wall sections and heavier flanges than PN10 (10 bar) valves. PN16 provides higher pressure containment for medium-pressure systems, while PN10 is suitable for lower pressure water distribution and irrigation networks. The shell test pressure for PN16 is 2.4 MPa (1.5 × PN), and the sealing test pressure is 1.76 MPa (1.1 × PN).
Q4: What is BS5163 standard?
A: BS5163 is a British Standard for "Resilient seated gate valves for waterworks purposes." It specifies requirements for ductile iron gate valves with resilient seating, including design, materials, face-to-face dimensions, flange dimensions, and testing. BS5163 is widely used in European and international water and wastewater projects.
Q5: What elastomer options are available for the wedge?
A: The wedge can be coated with EPDM (ethylene propylene diene monomer) for service temperatures from -10°C to +120°C, or NBR (nitrile rubber) for service temperatures up to 80°C. EPDM is preferred for potable water and general water service, while NBR offers better resistance to oils and fuels. WRAS-approved EPDM is available for drinking water applications.
Q6: Can this valve be used for buried service?
A: Yes. Ductile iron GGG50 resilient wedge gate valves are suitable for buried service. The fusion bonded epoxy coating (minimum 250 microns) provides corrosion protection, and the sealed body/bonnet bolts prevent ingress of water and soil. For buried installation, we recommend using a valve box or access chamber for operation and maintenance access.
Get a Fast Quote for Ductile Iron GGG50 Gate Valve
Send us your size (DN50 – DN600), pressure rating (PN10 / PN16), elastomer type (EPDM / NBR), and quantity. Our team will reply within 24 hours with price, drawing, and delivery time.
Email: sales@tengsvalve.com
Website: Request a Quote Online
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