MH-XQH 350 G -350 PSI Swin Check Valve Grooved End
The MH-XQH-350G is a high-pressure, grooved-end swing check valve designed for fire protection and commercial piping infrastructure. It is engineered to allow fluid to flow in a single direction while completely preventing backflow
Description
⚙️ Core Technical Specifications
| Parameter | Specification Details |
|---|---|
| Model Designation | MH-XQH-350G |
| Size Range | Available from 2″ to 12″ (DN50 to DN300) |
| Working Pressure | Rated up to 350 PSI (24.1 bar) maximum working pressure |
| Testing Pressure | Hydrostatic Shell Test: 700 PSI (48.2 bar) Hydrostatic Seat Test: 525 PSI (36.2 bar) |
| Working Temperature | Maximum up to 80°C (176°F) |
| End Connections | Grooved ends compliant with ANSI/AWWA C606 or Metric standards |
| Body Design | Includes built-in test plugs installed on the valve body for convenient system checks |
🧱 Material Composition
-
- Valve Body & Bonnet: High-strength Ductile Iron
- Clapper / Disc: Stainless Steel 304 or Ductile Iron
- Facing Seal: Resilient EPDM rubber for a bubble-tight, leak-free seat seal
- Seat Ring: High-grade Bronze (C95400) or resilient material
- Spring & Hinge Pin: Corrosion-resistant Stainless Steel 304
- Protective Coating: Electrostatically applied Fusion-Bonded Epoxy (FBE) coating on both internal and external surfaces (Fire Red RAL 3000) for premium corrosion protection in compliance with AWWA C550. [1, 2, 3, 4, 5, 6]
📜 Standards & Approvals
- Fire Safety Certifications: Dual certified UL Listed and FM Approved
- Design Standards: Conforms to UL 312 and FM Class 1210 safety criteria
- Potable Water Compliance: Available with certified lead-free configurations meeting NSF/ANSI 61 and NSF/ANSI 372 options.
- Flow Orientation: Suitable for horizontal installation, or vertical installation with the flow direction pointing upward.
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