VV34, 35 & 36 VACUUM BREAKERS

VV34, 35 & 36 VACUUM BREAKERS

Vacuum Breakers

Mankenberg Industrial Valves

Vacuum breakers – also called vacuum venting valves or vacuum limiters - are valves which allow air to be aspirated once a set vacuum or pressure difference to atmosphere is reached. These valves are installed on pipelines, vessels, machines and equipment and are used, for instance, for venting tanks, limiting the vacuum in vacuum systems and protecting steam installations.

For control duties vacuum breakers may be used only to a limited degree. For such duties we recommend using the diaphragm-controlled vacuum control valve VV 33.

The VV 34 and VV 35 vacuum breakers have a tension spring and a spring cap complete with scale for setting the breaking pressure.

Under normal operating conditions the valve is kept closed by a pre-loaded spring and the internal vacuum acting on the valve cone. If the vacuum drops below the value set by means of the spring, the valve is opened by the atmospheric pressure and air enters the system. With increasing air flow the cone stroke and spring force increase. The pressure difference increases accordingly.

    These valves are no shut-off elements ensuring a tight closing of the valve. In accordance with DIN EN 60534-4 and/or ANSI FCI 70-2 they may feature a leakage rate in closed position in compliance with the leakage classes III optional V:
  • Leakage class III (metal sealing cone) = 0.1 % Kvs value
  • Leakage class V (soft seal cone) = 1.8 x 10-5 x ?p x D* [l/h] *D=seat diameter


Please click HERE to view the VV34, VV35 & VV36 One Sheeter







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Why choose Boiswood for your VV34, 35 & 36 VACUUM BREAKERS

Fast Turnaround
Fast Turnaround
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Our local stocks allow us to quickly respond to requirements for regulators. Boiswood can evaluate and repair regulators the same day they are returned and despatch back out on a next-day delivery service.
Local Technical Support
Local Technical Support
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Boiswood offer a technical helpline from our HQ as well as having a “man on the ground” for on-site support whenever and wherever this is required.
In-House Repair Centre
In-House Repair Centre
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We can offer manufacturer certified in-house evaluation, repair, testing and assembly of GO regulators from within our Boiswood workshop.
Training Services
Training Services
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We offer a range of educational classes and training seminars that can be delivered from Boiswood HQ or on-site. We can deliver a bespoke seminar tailored for your needs.