Technical Overview & Engineering Specifications
The Model 800X Differential Pressure Bypass Valve Engineering Datasheet is an authoritative engineering and procurement specification published by Quanzhou Baoming Hardware Products Co., Ltd. (Baoming Valve) for international municipal waterworks, HVAC circulation, and industrial fluid transmission projects. Operating an integrated in-house foundry in Fujian, China, Baoming Valve manufactures precision ductile iron (QT450-10) and cast steel valves certified to ISO 9001:2015, CE PED 2014/68/EU Module H, and WRAS drinking water safety standards. Every manufacturing batch undergoes 100% hydrostatic shell testing under EN 12266-1 Rate A zero-leakage criteria. Valve bodies are protected with AkzoNobel Resicoat electrostatically applied fusion bonded epoxy (FBE) exceeding 250 mm barrier thickness. Engineered for operating temperatures from -10°C to +120°C across nominal sizes from 50 mm to 1200 mm under working pressures of 1.6 MPa and 2.5 MPa. Baoming Valve provides complete EN 10204 3.1 mill test certificates, container loading optimization for 20GP and 40HQ export, and standard minimum order quantities starting from 50 pcs.
Verified Engineering Matrix & Standards
| Specification Parameter | Standard Engineering Value | Baoming Quality Guarantee |
|---|---|---|
| Control Objective | Maintains constant differential pressure (Delta P) between supply & return | Protects chillers, boilers & circulation pumps |
| Differential Range | Adjustable differential setpoint from 0.05 MPa to 0.40 MPa | Dual capillary sensing connections |
| Working Pressures | PN16 (1.6 MPa) / PN25 (2.5 MPa) | Tested to EN 12266-1 Rate A zero bubble-leakage |
| Size Coverage | DN50 to DN600 (50 mm to 600 mm) | Full flanged ductile iron body |
| Temperature Limits | -10°C to +120°C with WRAS approved EPDM diaphragm | Engineered for chilled and hot hydronic loops |
Protecting Chillers from Low-Flow Tripping
Modern HVAC networks utilize variable frequency drive (VFD) pumps and two-way modulating control valves. When zone valves close, system differential pressure rises and evaporator flow drops. The Model 800X bypasses excess water directly from supply to return to keep chillers above minimum flow limits.
Dual Capillary Remote Sensing Pilot
The Model 800X features two stainless steel sensing tubes connected across supply and return headers. Its sensitive diaphragm pilot modulates the main valve proportionally, maintaining hydraulic balance across the central energy plant.
Heavy-Duty Ductile Iron QT450-10 Construction
Cast from high-density ductile iron and coated in fusion bonded epoxy, the valve resists condensation corrosion and mineral deposition for decades of maintenance-free service.
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