B-Disc — double offset butterfly control valve, 2–90 inches, ANSI 150–900
A double offset butterfly control valve from 2 to 90 inches, ANSI classes 150–900 and PN 10–160. Leakage class up to V for the metal seat and VI for the soft seat. Used at compressor stations, fuel gas pipelines, gas treatment plants and in chemical processes.
- Type
- double offset
- DN
- 2–90″
- Pressure
- ANSI 150–900; PN 10–160
- Seat
- metal, soft, combined
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
B-Disc is a double offset butterfly valve for controlling flows in industrial processes. It combines high capacity with precise control and suits both throttling and tight shutoff. The double offset of the disc axis from the body and seal axes moves the disc away from the seat at the very start of rotation, so wear and torque are reduced. In the closed position the disc seats tightly against the seat. The shaft is protected against blowout.
For conditions with a risk of cavitation or increased noise, a disc with drilled fins is offered. A high-capacity trim and a fast-acting version for fast opening or closing are available. Each variant is selected by calculation of the operating conditions. Seats are metal, soft or dual combined. The leakage class reaches V for the metal seat and VI for the soft seat.
Range from 2 to 90 inches, ANSI classes 150–900 and PN 10–160. Materials include carbon, low-temperature and low-alloy steels, austenitic stainless steels, duplex and super duplex steels, nickel alloys, aluminum bronze, titanium and EN grades. Stem packing is graphite, PTFE or low-emission. Connections are ANSI flanged (RF/RTJ), wafer and lug. Actuators are pneumatic, electric, hydraulic and electro-hydraulic, and a manual gearbox is available.
The valve has passed fugitive emission tests to ISO 15848-1 and fire tests to API 607. It has a SIL assessment to IEC 61508 with PFD values up to the SIL 3 range. These figures document tightness against external emissions and functional safety, which matters for gas lines with strict equipment safety requirements.
Large-size butterfly control valves are justified where high flow rates at moderate pressures are needed. These include compressor recirculation and suction lines, fuel gas pipelines, gas treatment and purification plants, flare systems, compressor station cooling water and chemical processes. The seat type, material and actuator are selected for the medium, pressure and temperature of the particular line.
Technical specifications
| Type | double offset |
|---|---|
| DN | 2–90″ |
| Pressure | ANSI 150–900; PN 10–160 |
| Seat | metal, soft, combined |
| Leakage class | up to V (metal), VI (soft) |
| Options | disc with drilled fins (anti-cavitation / noise), high-capacity trim, fast action |
| Materials | carbon, LTCS, low-alloy, stainless, duplex, super duplex, Ni alloys, aluminum bronze, titanium |
| Tests | ISO 15848-1; API 607; SIL (IEC 61508) |
Request a price and lead time
B-Disc — double offset butterfly control valve, 2–90 inches, ANSI 150–900. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Questions and answers
What size and pressure range does B-Disc have?
Sizes from 2 to 90 inches, ANSI classes 150–900 and PN 10–160.
What leakage class is available for different seat types?
Up to V for the metal seat and VI for the soft seat. A dual combined seat is also available.
Is there a version against cavitation and noise?
Yes, a disc with drilled fins for anti-cavitation and low-noise conditions. A high-capacity trim and a fast-acting version are offered separately.
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