| 摘要 |
An adjustable fail-safe suction stop valve is provided for provding hot gas defrost in refrigeration applications. The dual position valve (10) utilizes a single solenoid (20) and a pair of check valves (60,62) in a configuration that allows the evaporator pressure to be internally equalized through the valve to an adjustable setting over the suction pressure after a defrost cycle has occurred. The intermediate stage allows for this equalization to occur in a controlled manner without the need for an equalization valve. |
