The TGV307 is a multifunctional, thermally actuated temperature-control valve with on/off switching. It requires no external power supply and is available in a wide range of models, making it particularly suitable for gas heaters, convection air heaters, storage water heaters, wall-mounted heating boilers, commercial gas appliances, and other gas-fired equipment that demands precise temperature control.

Function

The TGV307 is a multifunctional, thermally actuated temperature-control valve with on/off switching. It requires no external power supply and is available in a wide range of models, making it particularly suitable for gas heaters, convection air heaters, storage water heaters, wall-mounted heating boilers, commercial gas appliances, and other gas-fired equipment that demands precise temperature control.

Technical Specifications

• Gas connection: G3/8"
• Gas types: Classes I, II, and III
• Maximum gas inlet pressure: 50 mbar
• Outlet pressure adjustment range: 3–18 mbar
• Operating ambient temperature range: 0~80°C
• Regulator (optional): Class C
• Flame inspection device:.
Ignition time: < 10 seconds Shutdown time: < 60 seconds
Service life: 10,000
• Manual flameout device: Service life: 10,000

Key Features

• The main control knob has OFF, pilot flame, and temperature adjustment (MS) positions.
• Flame-sensing thermocouple assembly with a flame-out re-start prevention feature (GM)
• Maximum output air volume adjustment (RQ), or
• Output pressure regulator (PR)
• Minimum (bypass) air flow regulation
• Thermal thermostat (TH) with switching function
• Pilot flame outlet (RQ) with a preset gas flow regulator
• Air inlet and pilot flame filter (FL)
• Pressure monitoring ports for the inlet and outlet
• Main inlet and outlet ports located on both sides of the valve or at the valve base
• The main tracheal interface is a threaded tube or a conical tube.

Working Principle Diagram

Installation dimensions (mm)

Temperature Adjustment Specifications

The adjustment specifications for the switch-function-modulated thermostat are shown in the figures and tables below.

The regulation range

a b c 8~33°C 3 3 2 13~31°C 2 2 2 13~38℃ 3 3 2 13~43°C 3 3 3 13~48℃ 4 4 3 21~46℃ 3 3 2 30~100℃ 9 9 5 40~72℃ 5 5 3 40~90℃ 5 5 3 Customizable based on customer requirements.

Gas flow

Gas families Q Delta P 1st (d=0.45) 3.0 m³/h 5m bar 2nd (d=0.55) 2.7 m³/h 5m bar 3rd (d=1.55) 1.6 m³/h 5m bar The air flow rate Q (at 15°C and 1013.25 mbar) is a function of the inlet–outlet pressure difference ΔP, with the switch set to 7 and the temperature sensor probe in a cooled state.

Curve No. Gas type Inlet pressure range Nominal Max. Min. 1 H 18 23 15 2 H 20 25 18 L 20 25 18 3 L 25 30 20 The gas flow rate Q (at 15°C and 1013.25 mbar) is defined by EN 88 as a function of the outlet pressure Pu, with the switch set to position 7 and the temperature sensor probe in a cooled state.

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