The ATEX Quick Sliding Valve uses Gas Generators to close the valve if a deflagration is detected as provided with most new systems. But additionally ATEX valves are provided with plant air operated slow stroke functions to allow the manual opening and closing of the valve for maintenance. This ATEX feature provided the operator with an easy check of the valve mechanics since the slow stroke test is more severe than the anger test. This test meets the requirements of NFAP without an anger test that destroys the firing mechanism defeating the purpose of the test. The valve is connected by a removable plug to allow maintenance as required and easy valve disconnection as required without disconnecting wiring. Because of the unique ATEX benefits the entire system can be user maintainable without the high cost of factory service.