Technical Overview & Engineering Specifications
The EN 593 Double Eccentric Flanged Butterfly 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 |
|---|---|---|
| Design Standard | EN 593 / ISO 5752 Series 13 & 14 / EN 1074-1 & 2 | High performance double offset geometry |
| Size Range | DN200 to DN1200 (8 inch to 48 inch) | Large diameter trunk water transmission |
| Pressure Classes | PN10 / PN16 (1.6 MPa) / PN25 (2.5 MPa) | Zero bubble leakage to EN 12266-1 Rate A |
| Seat & Disc Metallurgy | Stainless steel 316 weld-overlay seat / EPDM seal ring | Cam-action lifts seal off seat to eliminate wear |
| Operation & Actuation | Self-locking worm gearbox / ISO 5211 electric actuator pad | Low operating torque cuts actuator size by 35% |
Dual Offset Geometry Eliminates Continuous Seat Friction
The double eccentric shaft placement allows the disc seal to break contact with the body seat during the initial 5 degrees of rotation, completely eliminating rubbing friction and extending rubber seal life by over 500%.
Replaceable Stainless Steel Seat Retaining Ring
The body sealing ring is secured by an adjustable stainless steel clamp ring, allowing field seat inspection or replacement without dismounting the valve body from the pipeline.
Worm Gearbox with Mechanical Position Stops
All manual valves are equipped with IP68 waterproof multi-turn gearboxes with adjustable mechanical travel limit bolts and dial position indicators.
Request Engineering Datasheets & Pricing
Direct technical consultation and container load quotation from Baoming Valve engineers.