Sanitary Butterfly Valve — Pneumatic Wafer Body, 304 Stainless, Tri-Clamp

Product Description

A wafer-body pneumatic butterfly valve in 304 stainless steel (316 to order), sized Ø12.7 to Ø101.6 mm (1/2″ to 4″ tube OD). The valve body is clamped between two ferrules and the disc rotates 90° to open or close. A pneumatic actuator sits on the top platform, bolted through four M6 or M8 holes.

It is short, light and cheaper than a ball valve of the same size — and that is exactly what it is for. Face-to-face runs 66 to 82 mm across the whole range, so it drops into piping that has no room for a ball valve. Full dimensions are on the dimension sheet above.

The PTFE Seat and Your Line Temperature

The seat in this valve is PTFE, and it is the seat that sets the working temperature — the 304 stainless body will take far more heat than the seat will.

Tell us the temperature of your line when you enquire — a heated jacket, a hot flush, a wash cycle — and we will confirm the seat suits it.

Specifications

Which Actuator: DA or SR?

• Double acting (DA) — air drives it open, air drives it closed. Lose the air and the disc stays where it was. Use it where a stuck-in-position valve is acceptable.
• Spring return (SR) — air drives it one way, a spring returns it the other. Lose the air and the spring takes over. Use it where the valve must land in a known position if the air fails.

Tell us which way the valve must fail and we will quote the matching cylinder. It is the same pneumatic cylinder range we fit to our ball valves, so a plant running both keeps one spare-parts list.

Where It Belongs

• Water treatment and filtration skids — isolation on reverse-osmosis pretreatment, cooling tower sidestream filtration and clarifier effluent lines, where the valve cycles often and the skid has no space to spare.
• Chemical process lines — the PTFE seat covers the wetted surface of the body, so acids, alkalis and solvents never reach the metal.
• Beverage and brewing transfer lines — the clamp connection lets you lift the whole valve out between batches without unbolting pipework.
• Air handler coils and branch take-offs — chiller, boiler and change-over branch points, where a short wafer body fits what a ball valve will not.
• Heat exchanger branch circuits — isolation and bypass around plate heat exchanger loops, chosen on cost, weight and footprint.
• Compressed air and nitrogen utility lines — high-cycle automatic shut-off on plant branches; double acting and spring return cylinders both in stock.

Buying From Us

• Manufacturer, not a trading company. We build these in our own factory in Taiwan and have been making stainless steel valves since 1999.
• Valve and actuator from one supplier. The cylinder is ours, the valve is ours, and they are matched before they ship. Nothing to figure out on site.
• OEM welcome. Send us your drawing.

Tell us the size, the medium and its temperature, and whether you need DA or SR. That is enough for us to quote.

FAQ

What limits the temperature of this butterfly valve?

The seat, not the body. The seat is PTFE, and it reaches its limit long before the 304 stainless body does. Tell us the temperature of your line when you enquire and we will confirm whether this valve suits it.

Is a butterfly valve the right choice, or should I buy a ball valve?

Buy the butterfly valve for tank isolation, large flow and on/off duty, especially at 2″ and above where it is clearly cheaper. Buy a ball valve if you need a straight unobstructed bore, if the medium carries particles that could wedge against the disc, or a 3-way ball valve if you need to divert flow between two lines. We make both and will tell you which one your line needs.

Does the disc stay in the flow path when the valve is open?

Yes. That is how every butterfly valve works — the disc turns edge-on to the flow but never leaves the bore. If you need a clear, unobstructed passage, a ball valve is the valve you want.

What sizes do you make?

Ø12.7 to Ø101.6 mm, which is 1/2″ to 4″ tube OD. Eight sizes, all listed on the dimension sheet above.

Which actuator should I order — double acting or spring return?

Double acting if it is acceptable for the disc to stay where it is when the air supply fails. Spring return if the valve must land in a known position on air loss. Tell us which way it has to fail and we will fit the matching cylinder.

How does this valve connect to my pipe?

It is a wafer body: it sits between two ferrules and the clamp holds the assembly together. The valve itself has no threads or welded ends.

Can I order the valve and the actuator together?

Yes, and it is how most customers buy it. The cylinder is ours, the valve is ours, and they are assembled and matched before shipping.

Do you have a minimum order quantity?

No. Tell us the sizes and quantities you need and we will quote them.