A4021A1002 - Valve Proving System

Type: A4021A1002

Supply voltage: 220...240 VAC, 50 Hz

Test-time: 25 seconds per valve

Brand: Honeywell

Condition: Lotted

Stock: Subject to availability

Price: Available on request

Plug-in base: Ordered separately

The A4021 is a self-checking microprocessor based valve proving system. The A4021 checks the effective closure of automatic shut-off valves by measuring the pressure differential between two valves during the test sequence. Plug-in base and pressure switches are required to complete the system.

When during the test sequence of the A4021 a failing valve is detected, the A4021 will go into a non-volatile lock-out status, generates an alarm and prevents a burner start-up.

The intended application is for gas fired power burners and other large capacity gas firing installations, where according to the European norm EN676 a valve proving system can be used as an alternative for pre-purging the combustion chamber. And for installations with or without pre-purge with a capacity of more than 1200 kW.












Type: A4021A1002

Supply voltage: 220...240 VAC, 50 Hz

Test-time: 25 seconds per valve

Total test-time: 65 seconds approx.

Recommended pressure switch: C6058A gas pressure switch

For more information on technical data, please see data sheet.














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