| 摘要 |
<p>A low gas pressure emergency shutdown valve and regulator assembly is housed in a valve body 11 having a flow passageway interposed in a gas supply line and comprises a gas pressure regulating, diaphragm/spring responsive poppet valve 14 and a companion diaphragm responsive shut-off valve 12 in the upstream end portion of the valve body maintained open by a pin 74 bearing against a stem 60 of the shutoff valve. Downstream fluid pressure, in response to a predetermined pressure limit in a flow control chamber, biases the diaphragm 46 of the shut-off valve 12 in a pin collapsing direction and moves the shutoff valve to a flow passageway closed position. <IMAGE></p> |
