Absolute Vacuum present:
Vacuum valves: Edwards^® (formely known as BOC Edwards^®) vacuum valves

Complete Range

Whatever the application, Absolute Vacuum supplying Edwards^® has the right solution to meet your process requirements. Well known for it's innovation in pump design, Edwards^® applies the same energy and commitment to it's valves. The result is an extensive range of valves, with a choice of actuation methods, materials and size. Materials of construction have been uncompromisingly selected for performance in high vacuum.

Confidence in Edwards^® valves begins early in the design process.  Techniques such as Finite Element Analysis are used to optimise design of the valve. An arduous testing program in our environmental testing laboratory prior to release to production ensures that every valve supplied will meet the needs of the customer's application. Once in production, all valves are subject to stringent quality control and are individually tested with a helium mass spectrometer leak detector.

Bellows sealed pipeline valves are manufactured with 100% grease free 'O' rings exposed to vacuum delivering unrivalled low contamination levels.

Edwards^® Vacuum Valve Selection Guide

When you design a vacuum system, your choice of valves will be determined by the need for certain parameters. The Vacuum valve selection table below summarises the essential performance data of the Edwards^® range of vacuum valves. When you choose a valve for your vacuum system, consider all of the parameters listed in the left hand column of the table as described below.

Actuation

The choice is manual, solenoid or pneumatic, which will be determined by your system design and what facilities are available to the vacuum system.

Leak tightness

This is the maximum leak rate for the valve overall and across the seat, and the choice of valve will be determined by the vacuum operating level in your system.

Dirty System Tolerance

Vacuum valves have a differing ability to remain leak tight in 'dirty' vacuum systems. If your system generates or contains dust or other particulates, choose a valve with a high tolerence.

Size

Choose a valve which complements the size of your vacuum pipeline. To maintain high pumping speeds and throughputs, do not reduce the size of your pipeline to accommodate a smaller valve.

Cost

If cost is the limiting factor in your system design, look for the valves with the lowest cost which gives you the maximum performance.

Pressure range

Both the maximum and minimum pressure rating are important, particularly if the vacuum system is occasionally pressurised to above atmospheric pressure.

Port Configuration

Depending on the location of the valve, you may need either an in-line or right angle valve.

Maximum baking temperature

This is important if you intend to bake your system or if it operates at high temperature.

Life

The mean time to failure is important for solenoid and pneumatic valves in rapid cycle duties, or where you have extended maintenance intervals.

Relative Conductance

Choose a high conductance valve when high flow or throughput conditions exist or when pump-down time is important

Position Indication

You may need local or remote indication f valve position as part of your control system.

Closure speed

Use either a solenoid valve or pneumatic valve if you must rapid valve closure

Corrosion resistance

Valves are available in stainless steel for those applications that process corrosive gases.

Edwards® Solenoid Operation Isolation Valves MTTF up to 500000 cycles Circuit protection against transient low voltages Low energy consumption and operating temperature In-line or right angle versions Edwards PVEK solenoid isolation valves Edwards LCPVEK solenoid isolation valves
Edwards® Soft-start isolation valve High reliability to 5000000 cycles Fast acting typically 41ms (PV25) Position indicating microswitch standard Bellows sealed for clean operation Edwards SIP VP soft start isolation valves
Edwards® SP Speedivalve diaphragm isolation valve Extremely rugged and 'dirty' system tolerant Will withstand 9 bar overpressure (with Co-Seal) Easily serviced with choice of diaphragm materials Visual indication of valve open Edwards SP Speedivalve manual operation isolation valves - NW flanges
Edwards® QSB Quarter swing butterfly valves Pneumatically or manual operation High conductivity Resists atmosphere in either direction Compact and quick acting Edwards QSB quarter swing butterfly valves
Edwards® Industrial butterfly valves Rugged and dirty system tolerant Manual or pneumatic options Optional position indicators MTTF 30000 cycles Edwards industrial quarter swing butterfly valve
Edwards® Pneumatic bellows sealed isolation valve 5000000 cycle MTTF Stainless steel or aluminium bodies available 'O' ring shaft seal option In-line or right angle versions Edwards PVPK pneumatic operation isolation valves
Edwards® Pneumatic 'O' ring sealed isolation valve Fast acting – 20 ms to close (PV16) Electrical and visual indication of valve status Optional integral solenoid valve Lightest valve and smallest envelope Edwards PVEK solenoid isolation valves
Edwards® Gate valve Electropolished inside and out High reliability – 10000000 cycle option Optional 3 position operation Vacuum brazed to 1100°C to eliminate virtual leaks Edwards GVA/AVA Aluminium gate/angle valves
Edwards® Air admittance valve Normally open or normally closed version Small envelope IP65 protection with wide voltage options MTTF 100000 cycles Edwards AV5A air admit valve Edwards AV10K air admit valve dwards IPVA10EK solenoid air admit valve
Edwards® IBV ball valves Hight conductance full bore pumping Rugged and dirty system tolerant Corrosion resistant construction NW flanges or BSP threaded versions Edwards IBV series vacuum ball valves