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Check-Valves In Disposable 30-lb Refrigerant Canisters
Posted to HVAC Forum on 3/9/2005 2 Replies

NetChillers:

When did check-valves within the dispensing-valve assembly become common on 30-lb disposable canisters of virgin R-134a refrigerant? Are they a legal requirement in the US automotive market? If so, when did that become effective?

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