Explore our industrial valve systems manufactured in compliance with international design parameters. High reliability, exact material specification, and rigid testing standards.
In the field of flow control technology, the EPDM Lug Butterfly Valve stands out as a critical component in municipal water systems, industrial process plants, and HVAC networks. Combining the mechanical rigidity of a lugged body design with the elastic recovery and chemical stability of Ethylene Propylene Diene Monomer (EPDM), this class of valve delivers highly efficient bi-directional bubble-tight shutoff under varying pressures and temperatures.
Unlike wafer-type alternatives, lug-style valves feature threaded metal inserts (lugs) around the valve body. This mechanical feature enables the valve to be installed directly into piping systems using two independent sets of bolts. Crucially, it allows for downstream piping removal or maintenance while maintaining system pressure upstream—a function commonly known as dead-end service.
EPDM seat compounds are vulcanized to withstand steam, hot water, dilute acids, and alkaline media. Operating temp range spans from -20°C to +120°C depending on composition parameters.
Heavy duty lug configuration allows isolated segment shutdown. Standard pressure rating up to PN16/250 PSI under dead-end operations without flange drop-offs.
Molded seat design features precision-machined contact ribs. Minimizes contact friction with the polished disc edge (CF8M/Ductile Iron), prolonging actuator lifespans.
KR Valve is a specialized manufacturer of standard and custom industrial valves. With over two decades of experience, we operate an integrated system covering structural design, metallurgical casting control, precise machining, and rigorous hydro-testing.
Our manufacturing processes conform to international standards including ISO 9001:2015, CE-PED, and API 609 specifications. Our active catalog comprises more than 500 valve designs, spanning high-performance concentric butterfly valves, resilient seated gate valves, dual-plate check valves, and pressure-regulating water control valves.
By implementing CNC machining centers and advanced elastomer vulcanization equipment, we ensure that every EPDM seat geometry aligns perfectly with the disc profile. This meticulous control yields zero-leakage performance under extreme conditions.
Our operation is built on three core pillars: Design Innovation, Standardized Production, and Strict Zero-Leakage Inspections.
Our R&D team utilizes advanced CAD and FEA (Finite Element Analysis) tools to simulate pressure distributions, flow patterns, and torque characteristics. This continuous optimization keeps our products aligned with strict environmental regulations.
With over 30 dedicated production units, our plant operates under standardized protocols to optimize material flow and assembly times. We maintain a rotating inventory profile to ensure prompt delivery timelines for our global clients.
Every valve undergoes shell and seat hydrostatic testing in strict accordance with ISO 5208 and API 598 standards prior to packing. No valve leaves our facility without verified zero-leakage performance under rated design limits.
EPDM lug butterfly valves are crucial components across diverse industrial sectors. Their robust design makes them suitable for demanding environments where fluid containment, pressure integrity, and operational safety are paramount.
| Industrial Sector | Application Environment | Key Performance Requirement | EPDM Advantage |
|---|---|---|---|
| Water Treatment & Desalination | Pre-filtration, reverse osmosis, and municipal distribution pipelines. | Corrosion resistance and bi-directional bubble-tight shutoff. | Resists scaling, ozone degradation, and organic compounds. |
| HVAC & Heating Systems | Chilled water lines, condenser water loops, and heat exchangers. | Cycling resilience and thermal expansion tolerance. | Maintains elasticity under persistent temperature fluctuations. |
| Chemical Process Industries | Dilute acid lines, alkaline neutralization circuits. | Broad chemical compatibility and secure sealing. | Prevents seat degradation caused by oxidizing media. |
| Power Generation & Cooling | Auxiliary cooling water networks, ash handling slurry systems. | Erosion resistance and high flow coefficient (Cv). | Elastomeric seat absorbs impacts from soft particulate matter. |
For international procurers, sourcing from a specialized Chinese manufacturer like KR Valve offers a balanced combination of cost efficiency, engineering expertise, and supply chain agility. China's industrial valve sector has evolved from simple copy fabrication to advanced, vertically integrated engineering.
Our proximity to advanced raw material suppliers and specialized casting foundries minimizes logistical delays. This enables us to secure high-quality ductile iron (GGG40/GGG50), carbon steel (WCB), and stainless steel (CF8M) at predictable rates.
Our engineering department quickly translates custom specifications—such as special shaft designs, unique flange drilling configurations (ANSI, DIN, JIS), or specific paint systems—into production-ready designs without interrupting ongoing production lines.
By using modern testing benches, digital torque gauges, and spectrophotometers for material composition checks, we ensure that cost-effective manufacturing is matched with rigorous quality assurance.
To select the correct valve for your piping system, you must evaluate several engineering parameters. Below is a detailed breakdown of the construction features of our standard custom EPDM Lug Butterfly Valves.
Cast Ductile Iron (ASTM A536 65-45-12 / GGG40) or WCB. Lugged design features threaded bolt holes conforming to ASME B16.1 Class 125, ASME B16.47, or EN1092-2 PN16.
Engineered with a streamlined, polished disc edge to minimize wear on the EPDM seat. Options include CF8, CF8M, Hastelloy, or Nylon-coated Ductile Iron.
We use high-grade EPDM seats with high polymer content, avoiding cheap fillers that cause premature seat degradation. Seats are available in cartridged or phenolic-backed designs.
Equipped with a blow-out proof, high-tensile stem (typically SS410, SS420, or SS316) that transmits maximum torque efficiently without deformation.
Get a firsthand look at our testing procedures and factory environment through our video demonstrations.
KR Valve products are used in municipal, industrial, and infrastructure projects around the world. Here are a few examples of our global installations.
Location: Chile
Supplied high-pressure, custom-calibrated water control valves to handle varying head pressures in municipal dam systems.
Location: Italy
Provided DN2000 double eccentric butterfly valves and dual-plate check valves for a municipal drinking water network upgrade.
Location: Indonesia
Supplied corrosion-resistant, EPDM-seated valves to manage highly abrasive sludge slurries in a municipal wastewater plant.
Location: Vietnam
Designed and supplied PTFE and EPDM-lined butterfly valves to manage mildly acidic process streams at a chemical production plant.
Location: Russia
Supplied low-temperature carbon steel gate valves and metal-seated ball valves designed for demanding gas collection lines.
Location: Brazil
Delivered customized water control systems to optimize flow rate and pressure stability in a wastewater treatment facility.
Get answers to common technical and commercial questions about specifying, sourcing, and installing EPDM lug-style butterfly valves.
Explore our wider range of industrial valves, including specialized liners, non-return check designs, and multi-stage water control valves.
KR VAVLE
