Axial Flow — axial shutoff valve with a pressure-balanced plug for ESD/HIPPS, up to 72 inches, up to ANSI 4500 / API 20k
Axial Flow shutoff valves with a pressure-balanced plug. Sizes from 2 to 72 inches, pressure up to ANSI 4500, PN 420 or API 20k. Used in ESD emergency shutdown systems and HIPPS overpressure protection systems.
- Design
- axial body, pressure-balanced plug, double seat
- DN
- 2–72 inches
- Pressure
- up to ANSI 4500, PN 420, API 20k
- Seat
- metal or soft
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
Axial Flow shutoff valves have a flow path profiled for maximum hydrodynamic efficiency. The flow runs along the body axis without sharp turns, so pressure loss is low and turbulence is minimal. The plug is pressure balanced, and only a small stem force is needed. The valve acts quickly even in large sizes and at high pressures. This is why axial valves are the basis of ESD emergency shutdown systems and HIPPS/HOPPS overpressure protection systems, for which the manufacturer has proven designs.
The body is compact and light. A double seat system gives tight shutoff, and the bearings are self-lubricating. Seats are metal or soft. Anti-cavitation and low-noise trim, tungsten carbide trim, and versions for low temperatures and erosive and corrosive media are supplied to order.
Range from 2 to 72 inches, pressure up to class ANSI 4500, PN 420 or API 20k. Materials: carbon, low-temperature carbon and low-alloy steels, austenitic stainless steels, duplex and super duplex steels, nickel alloys. Stem packing is graphite, PTFE or low-emission. Connections are ANSI and DIN flanges (RF/RTJ), API 6A flanges and hub connections. Actuators are pneumatic, electric, hydraulic and electro-hydraulic.
The design has passed fugitive emission tests to ISO 15848-1 and fire tests to API 607, and has a functional safety assessment to IEC 61508 with PFD values up to the SIL 3 range. A subsea version for deepwater HIPPS systems is also made.
In the gas industry axial shutoff valves work as isolation valves at the inlet of gas distribution stations and compressor stations, as emergency shutdown valves at underground gas storage, gas processing plants and LNG terminals. They are also installed as final elements of HIPPS that protect pipelines with a lower design pressure from overpressure from the source side.
Technical specifications
| Design | axial body, pressure-balanced plug, double seat |
|---|---|
| DN | 2–72 inches |
| Pressure | up to ANSI 4500, PN 420, API 20k |
| Seat | metal or soft |
| Materials | carbon, LTCS, low-alloy, austenitic stainless, duplex, super duplex, Ni alloys |
| Tests | fugitive emissions ISO 15848-1; fire tests API 607; SIL to IEC 61508 (up to SIL 3) |
| Actuator | pneumatic, electric, hydraulic, electro-hydraulic |
| Connections | ANSI/DIN RF/RTJ flanges, API 6A flanges, hub |
Request a price and lead time
Axial Flow — axial shutoff valve with a pressure-balanced plug for ESD/HIPPS, up to 72 inches, up to ANSI 4500 / API 20k. 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 do Axial Flow valves have?
From 2 to 72 inches, pressure up to ANSI 4500, PN 420 or API 20k.
What functional safety level is declared?
An assessment to IEC 61508 with PFD values up to the SIL 3 range. The valves have also passed fugitive emission tests to ISO 15848-1 and fire tests to API 607.
What is the axial valve used for in the gas industry?
As an isolation valve at the inlet of gas distribution stations and compressor stations, an emergency shutdown valve at underground gas storage, gas processing plants and LNG terminals, and a final element of HIPPS.
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