Threaded Screwed End Diaphragm Valve
Threaded Screwed End Diaphragm Valve Manufacturer
MVS Valve offers a high-performance Threaded Screwed End Diaphragm Valve designed for reliable operation in general-purpose industrial applications. Manufactured in a Weir Type design, this diaphragm valve is built with precision to ensure dependable flow control where threaded connections are required. It features BSPP threaded ends, making it ideal for compact pipelines and low-pressure systems where space and simplicity matter.
This valve is constructed using Ductile Iron GGG40 coated with durable black epoxy, ensuring enhanced corrosion resistance and longer service life. The handwheel-operated mechanism allows for smooth manual operation, and the valve includes a visible yellow position indicator for better user control. The flow is regulated using a flexible EPDM or Neoprene rubber diaphragm, which provides a secure shutoff and reduces the risk of leakage even in extended usage conditions.
The Threaded Screwed End Diaphragm Valve uses a seatless internal design with a bolted bonnet, ensuring ease of maintenance and minimizing replacement downtime. It’s simple linear motion and dependable performance make it a preferred choice in industries that handle non-aggressive fluids, including utilities, water distribution, process systems, and general fluid transfer setups.
At MVS Valve, we supply Weir Screwed End Cast Ductile Iron Diaphragm Valves, Weir Screwed End Stainless Steel Diaphragm Valves, and Weir Unlined Threaded End Diaphragm Valves, offering versatile material options based on the chemical nature of the media. Whether you need a diaphragm valve for a new installation or a replacement in an existing system, our screwed-end solutions are built to deliver consistent results with minimal upkeep.
Specification
| Specification | Details |
|---|---|
| Size Range | 15 mm to 80 mm |
| Design Standard | BS EN 13397:2002 (BS 5156) |
| Testing Standard | BS EN 12266-1 (BS 6755 Part 1) |
| End Connections | Screwed to BSP (BS 21 Parallel or Taper), NPT |
Material of Construction
| Component | Material |
|---|---|
| Body | - Cast Iron (IS 210 Gr. FG 200/220/260) - Cast Carbon Steel (ASTM A 216 Gr. WCB) - Stainless Steel SS 304 / 304L / 316 / 316L - Duplex Stainless Steel Grade 2205 |
| Diaphragm | Natural, Neoprene, Hypalon, Butyl, EPDM, Silicone |
| Spindle / Stem | AISI 410 / 304 / 316 |
Application Industries
Crude Oil & Natural Gas Industry
Chemical & Petrochemical Industry
Water & Wastewater Treatment
Nuclear & Thermal Power Generation
Food & Beverage Industry
Pharmaceutical & Biotechnology
Pulp & Paper Industry
Mining & Mineral Processing
Marine & Shipbuilding
HVAC & Building Services
Automotive & Paint Chemical Manufacturing
Environmental & Bio Gas Renewable Energy
Steel & Metal Processing
Fertilizer Plants, Polymer Production
Cosmetics & Personal Care
Cement & Construction
Chlor-Alkali Industry
Mineral Acids Industry
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Threaded Screwed End Diaphragm Valve
Frequently Asked Questions
Can’t find your duty condition here? Send us the media, size, pressure and temperature and we will specify the valve. Contact us
What is a threaded end diaphragm valve and how does it work?
A diaphragm valve supplied with screwed ends rather than flanges, so it threads straight into small-bore pipework. A handwheel drives a compressor that presses the flexible diaphragm onto the weir to close the line. The diaphragm isolates the media from the stem and bonnet completely, and the screwed ends keep the installation compact — the usual combination for small dosing, sampling and utility lines.
Which body materials and diaphragms are available?
Body in Cast Iron (IS 210 Gr. FG 200/220/260), Cast Carbon Steel (ASTM A216 Gr. WCB) or Stainless Steel. Diaphragms in Natural rubber, Neoprene, Hypalon, Butyl, EPDM or Silicone. Spindle and stem in AISI 410, 304 or 316 stainless. Silicone is the option where the duty is hygienic or the temperature swings; EPDM and Butyl suit general chemical and water service.
What size, end connections and standards apply?
15 mm to 80 mm, with screwed ends to BSP (BS 21 parallel or taper) or NPT. Designed to BS EN 13397:2002 (BS 5156) and tested to BS EN 12266-1 (BS 6755 Part 1). MVS is ISO 9001:2015 certified and supplies test certificates with each order.
Should I specify threaded or flanged ends?
Threaded ends suit small-bore lines to 80 mm — compact, cheaper and quicker to install, with no flange gaskets to maintain. Flanged ends, as on the rubber lined and straight through valves, are the right choice above 80 mm, where the valve must come out without cutting pipe, and on any line where a threaded joint would be a leak risk. Match your existing pipework.
Are you a manufacturer, and what are your minimum order quantity and customization options?
MVS manufactures at its own works — since 1978, ISO 9001:2015 certified — and exports across several continents. The minimum order quantity is 20 pieces. BSP parallel, BSP taper and NPT threads, special diaphragm materials and stainless bodies are built to order.