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MSA Automatic Switch Valve (ASV)
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MSA Automatic Switch Valve (ASV)

The Automatic Switch Valve on the waist belt, to connect a compressed air breathing apparatus like the BD 96 Mini to a factory airline system or cascade air cylinders. Provides air supply if the airline is disconnected or if the external air source fails.

  • Fully automatic change-over valve
  • Automatic switching from external air source to BA and back again
  • Distinct warning signal when air-supplied by BA
  • Warning if BA cylinder is closed
  • Application as emergency air supply

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About is operated by Accurate Instruments (NZ) Ltd.
Accurate is one of the few 100% New Zealand owned and operated safety instrumentation companies in New Zealand today. This is in a market dominated by larger foreign owned companies, yet we continue to operate as a strong independent supplier to the NZ market.

We specialize in the supply, service and support of safety equipment and safety systems to protect workers and their workplaces with some of the world’s top quality technical safety instruments available, yet our pricing is highly competitive and represents value for money.

We are instrument consultants, and endeavour to find the right solution for our client by careful analysis of the application and intended result. We pride ourselves on our professionalism, ethical industry responsibility, specialist advice and service, quality of product, and of course our people.



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192 Marua Road
Mt Wellington
Auckland 1051

4 Avenger Crescent
Christchurch 8042