SAFETY DEVICE FOR INSTALLATION IN A GAS-SUPPLY SYSTEM, IN PARTICULAR, AN ACETYLENE-SUPPLY SYSTEM

摘要

Relevant specifications in the field of gas supply provide for different safety devices for installation in a gas-supply system, in particular, an acetylene-supply system. To provide such a safety device, which is characterized by a compact structure and a high level of operational reliability, this invention proposes that a valve body (1) incorporates an over-pressure valve (4; 104) of a quick-action shut-off device, a control valve (3; 103) of a pressure-limiting device, and a safety valve (2; 102), whereby the safety valve (2; 102) can be fluidically connected to the over-pressure valve (4; 104) and the control valve (3; 103), and closes either when the over-pressure valve (4; 104) opens due to an inlet pressure that is above the inlet-pressure limit value or when the control valve (3; 103) opens due to an outlet pressure that is above an outlet-pressure limit value.

主权项

1. A safety device for installation in a gas-supply system, where a main pressure regulator regulates an inlet pressure of a gas fed thereto to an outlet pressure, said safety device comprising:
a valve body to which the gas is fed at the inlet pressure and from which the gas is fed at the outlet pressure an over-pressure valve of a quick-action shut-off device, said over-pressure valve being configured to open responsive to the inlet pressure being above a predetermined inlet-pressure limit value, a control valve of a pressure-limiting device, said control valve being configured to open responsive to the outlet pressure being above a predetermined outlet-pressure limit value, and a safety valve fluidically connected to the over-pressure valve and the control valve, and wherein the safety valve closes either when the over-pressure valve opens due to the inlet pressure being at an inlet pressure level that is above the inlet-pressure limit value, or when the control valve opens due to the outlet pressure being at an outlet pressure level that is above an outlet-pressure limit value.