Technical Overview & Engineering Specifications
The Model 300X Slow-Closing Non-Slam Check 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 |
|---|---|---|
| Primary Function | Pump discharge check valve with two-stage cushioned closing | Eliminates destructive water hammer shock |
| Closure Speed Profile | Stage 1: 80% rapid close (fast) / Stage 2: 20% slow cushioned close | Adjustable 5 to 30 second closing time |
| Working Pressure | PN16 (1.6 MPa) / PN25 (2.5 MPa) across DN50 to DN600 | Hydrostatic shell test at 1.5x PN |
| Pilot Circuit Hardware | Stainless steel needle valve, ball valves, and Y-strainer | Durable corrosion-free external circuit |
| Coating & Lining | Food-grade fusion bonded epoxy (FBE) ≥ 250 mm | AkzoNobel Resicoat WRAS certified |
Two-Stage Hydraulic Cushioning Principle
When pump power stops, the 300X valve's main disc quickly closes 80% of its stroke while forward velocity diminishes, cutting off reverse flow before it builds momentum. The remaining 20% closes slowly via controlled pilot discharge, preventing acoustic pressure spikes.
Protects Pumps, Flanges, and Flow Instruments
By softening the hydraulic decrescendo, the 300X valve protects high-cost pump impellers, ultrasonic flow meters, and pipe joints from destructive shockwave damage.
External Needle Valve Adjustability
Commissioning engineers can fine-tune the final closing speed on-site using an external stainless needle valve to match the unique acoustic travel time of the specific pipeline network.
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Direct technical consultation and container load quotation from Baoming Valve engineers.