HP Butterfly Valve (SUS304, Lever, 10K)
Model: PMV-28
PMV-28 is a high-performance butterfly valve combining a SUS304 body and disc with an RTFE seat. With a short face-to-face dimension and concentric construction advantageous for installation in confined sections, the wide lineup - from compact 20A and 25A sizes up to large bores - is used for shutoff and branch lines in the chemical, plant, water/wastewater, and construction sectors.
Features
- Short face-to-face distance enables installation in confined spaces
- Simple structural design with low defect rate
- Quick open/close for effective fluid control
- High tightness and durability
- Concentric structure with low torque
- For powder fluids or operating temperatures over 120°C
- Seat: RTFE (usable up to 220°C); METAL for higher temperatures
Frequently Asked Questions
- What is the difference between RTFE and PTFE seats?
- PTFE (pure fluororesin) offers excellent chemical resistance and low friction, but has lower shape recovery under sustained compression and high-temperature cycling. RTFE (Reinforced PTFE) is PTFE blended with reinforcing fillers such as glass fiber, maintaining chemical resistance while improving dimensional stability and wear resistance. The standard seat for PMV-28 is RTFE; pure PTFE is available as an option for low-temperature, low-load environments.
- What is the maximum operating temperature? When is a metal seat needed?
- With the standard RTFE seat, the operating temperature limit is approximately 220°C. For temperatures above this, lines where steam contacts the seat directly, or abrasive slurry/high-solid-content fluids where long-term soft seat durability cannot be ensured, a metal seat specification is available. Metal seats have slightly higher leakage compared with soft seats but offer superior long-term reliability in high-temperature and high-wear environments. Please share your operating temperature, fluid type, and differential pressure for a seat material recommendation.
- Can a high-performance butterfly valve be used on small-bore lines?
- High-performance butterfly valves are generally supplied mainly for medium-to-large bore lines, but PMV-28 has a lineup extending down to 20A (3/4 inch) and 25A (1 inch) sizes, offering a broader selection than most manufacturers. For small-bore branch lines where short face-to-face length, fast open/close, and low operating torque are needed instead of gate or ball valves, PMV-28 can serve as an alternative. Please share the required size and we will advise on availability and lead time.
- Can it be used for fluids containing powder or solids?
- The CONCENTRIC disc design sweeps through the seat in a full arc, which tends to prevent foreign matter from accumulating on the seat surface in fluids containing powder or solids. However, for highly abrasive slurries or fluids with large particle sizes, seat wear may accelerate; please share the fluid characteristics for a joint review of seat material options.
- What installation advantages does a short face-to-face length provide?
- Wafer and lug type butterfly valves have a significantly shorter face-to-face length compared with gate or globe valves, allowing installation with minimal rework on existing piping. They are especially useful in confined pipe racks or vertical piping where bolt-up space is limited, and the reduced weight also eases support requirements.