Monoflange Valves
Monoflange Valves
Industry Standards & Certifications
HOFMAN HVF-LOK monoflange valves are designed and manufactured in strict compliance with major international engineering standards, including ASME B16.34, ASME B31.3, ASME B16.5, and API 6D / ISO 14313. Featuring a forged one-piece body design to minimize potential leak paths, these primary isolation valves are fire-safe certified to BS 6755 Part 2 and API 607 standards. Engineered for severe process and offshore applications, they deliver pressure-tight performance up to 10,000 psig (689 bar) and serve as compact alternatives to traditional Double Block and Bleed (DBB) valves.
Connections & Pressure Ratings
Hofman HVF-LOK monoflange valves are manufactured in forged SS316L, Super Duplex, Monel, and Inconel 625/825 with working pressure ratings up to 10,000 psig (689 bar) and flanged connections rated from Class 150 to 2500 (API flanges up to 10,000 lbs). Built to ASME B16.34, ASME B31.3, ASME B16.5, and API 6D standards, all monoflanges feature certified fire-safe protection to BS 6755 Part 2 and API 607 and include full EN 10204 3.1 heat code traceability.
- Designed to Industry standard – ASME B16.34, ASME B31.3, ASME B16.5, API 6D / ISO 14313
- Available in material SS316L. Other Materials such as SS304, Super Duplex, Monel, Inconel 625/825 Etc. are available on request.
- Inlet Flanged connections – Flanged as per 1/2” to 4”, 150 to 2500 class, API Flanges up to 2.1/16”, 3000, 5000 & 10000 lbs.
- Outlet Thread connections – 1/4″, 3/8”, 1/2”, 3/4″, 1” NPT, BPST, BSPP.
- One piece body means compact design with less leak points.
- Anti-temper on bleed connection.
- Maximum working pressure up to 10,000 psig. (689 bar).
- Optional packing material – PTFE, Graphoil, PEEK & PCTFE.
- All the Valves are 100% Factory Tested
- Fire safe to BS 6755 Pt2 / API 607.
- Heat code traceability.
- Brand-HVF-LOK.
Frequently Asked Questions (FAQ)
Q: What pressure ratings do HVF-LOK monoflange valves support?
A: HOFMAN HVF-LOK monoflange valves support maximum working pressures up to 10,000 psig (689 bar), with flanged connections rated from 150 to 2500 class and API flanges up to 2.1/16" (3,000, 5,000, and 10,000 lbs).
Q: Which international standards and certifications do these monoflange valves comply with?
A: HOFMAN monoflange valves are designed in strict compliance with ASME B16.34, ASME B31.3, ASME B16.5, and API 6D / ISO 14313 standards, and are fire-safe certified to BS 6755 Part 2 and API 607.
Q: What materials and packing options are available for HOFMAN monoflanges?
A: They are standardly manufactured in Stainless Steel SS316L, with Super Duplex, Monel, and Inconel 625/825 available on request. Packing options include PTFE, Graphoil, PEEK, and PCTFE.
Q: What end connections and design features are offered?
A: HOFMAN monoflanges feature a forged one-piece body to minimize potential leak points, anti-tamper bleed connections, 1/2" to 4" inlet flanged connections, and 1/4" to 1" NPT, BSPT, or BSPP outlet threads.