Technical Overview & Engineering Specifications
The Model 400X Precise Diaphragm Flow Control 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 preset volumetric flow regardless of pressure changes | Prevents branch overdrawing & system starvation |
| Sensing Mechanism | Calibrated stainless steel differential orifice plate across inlet | Senses dynamic flow velocity differential |
| Working Pressures | PN10 / PN16 (1.6 MPa) / PN25 (2.5 MPa) | Shell proof test to 1.5x PN |
| Size Availability | DN50 to DN600 (50 mm to 600 mm) | Flanged per ISO 7005-2 / EN 1092-2 |
| Material Quality | QT450-10 Ductile Iron + SS304 trim + FBE ≥ 250 mm | EN 10204 3.1 chemical & mechanical certs |
Preventing Upstream Overdrawing in Water Distribution Networks
In complex municipal distribution systems, consumers closest to pump stations frequently draw excessive volume, starving downstream users. The Model 400X valve caps maximum flow to a precise, non-negotiable threshold.
Differential Orifice Plate Flow Sensing
An engineered stainless steel orifice plate creates a slight pressure drop proportional to flow rate. The sensitive pilot senses this differential across the diaphragm, throttling the main valve whenever flow exceeds the target flow rate.
Energy-Efficient Throttling Profile
When flow is below the target limit, the Model 400X opens fully, generating virtually zero parasitic head loss and reducing pumping electrical power consumption.
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