SOLENOID SAFETY GAS VALVES (double action)
Solenoid safety gas valve (double action) is a device designed for control and regulation of gaseous mediums supply in gas burners of hot water and steam boilers, melting and drying furnaces, gas heaters and other gas consuming devices where the multi-step control of the flow is required.
Double action solenoid safety gas valves are composed of two shut-off safety gas valves and additional devices functioning in one housing, which allows combining various functions in one product:
- two shut-off safety gas valves
- shut-off safety gas valve – three-position solenoid safety gas valve (high/low gas flow mode)
- two shut-off safety gas valves and smooth opening function
- two shut-off safety gas valves and gas flow regulator (electromechanical or manual)
- multiblock unit based on the double valve.
ADVANTAGES (as compared with valve block units, assembled with single items):
- smaller overall dimensions (up to 30%);
- low total factor of hydraulic resistance;
- reduced time spent on installation and maintenance.
DIAMETER NOMINAL:
- 15; 20; 25; 32; 40; 50.
OPERATING PRESSURE:
- from 0 up to 6 bar (up to 0,6 Mpa).
CONNECTION TYPE:
- flange;
- coupling.
CLIMATIC VERSIONS:
- -30…+60 °С;
- -45…+60 °С;
- -60…+60 °С.
AMBIENT TEMPERATURE:
- -60…+70 °С (standard);
- -45…+120 °С (upon individual request).
ADDITIONAL FUNCTIONS AND DEVICES:
- can be equipped with position indicators of the shutter, pressure switches, manual or electromechanical flow regulator, density (leak- tightness) control valve;
- for connection of pressure switches, manometers, impulse tubes or other devices and instruments, the holes with G1/4” thread closed with plugs, are provided in the housing.
EXPLOSION PROOF VERSIONS:
- general industrial usage (protection degree IP65);
- explosion proof (protection degree IP67).
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If you need help selecting necessary equipment, please visit our website www.termobrest.ru or contact our specialists via e-mail info@termobrest.ru or by phone:
+375 (162) 53-64-13 (technical consultation line);
+375 (162) 53-64-76 (product sales department and logistics).
MOTORIZED GAS VALVES
Motorized gas valve is designed as regulating device and is intended for usage in automatic remote-control systems of gas burning installations to control and safeguard streams of various gas mediums including natural gas, hydro-carbonated gases, gaseous phases of liquefied gas, compressed air and other non-aggressive gases.
Note! Motorized valve is not a shut-off device. It is designed and applied for smooth regulation of gas flow.
OPERATING PRESSURE
- From 0 to 6 bar (up to 0.6 MPa);
HOUSING VERSIONS (two types):
Type 1. Motorized regulating gas valve – a rotary cylinder serves as a working (regulating) member that provides the smooth change of the gas volume flow rate from 0.05% (in a closed position) up to 100% (in a fully opened position).
DIAMETER NOMINAL:
- DN40÷200.
HOUSING MATERIAL:
- aluminum: DN40÷100;
- steel: DN40÷200.
OPERATING ENVIRONMENT TEMPERATURE:
- -60...+70 °C.
Type 2. Butterfly-type-gas valve – a rotary throttle serves as a working (regulating) member that provides the smooth change of the gas volume flow rate from 0.5% (in a closed position) up to 100% (in a fully opened position).
DIAMETER NOMINAL:
- DN15÷300.
HOUSING MATERIAL:
- aluminum: DN15÷200;
- steel: DN150÷300.
OPERATING ENVIRONMENT TEMPERATURE:
- -60...+120°C.
OPERATION MODE:
Power drive type
Manual type
In power drive type models, the flow rate control of the amount of passing gas through the motorized gas valve is controlled by the following types of actuators:
- «Regada» (Slovak Republic)
- «Belimo» (Switzerland)
- «Siemens» (Germany)
- and other (upon request);
In manual type models, the flow rate control of the amount of passing gas is controlled by turning the control handle attached to the output end of the shaft. The scale shows: opening angle in degrees, arrows and signs "+" and "-". When turning the control handle towards the "+" sign, the amount of passing gas increases; when turning towards the "-" sign, the gas flow decreases.
The extreme control of handle positions, corresponding to the minimum and maximum gas flow rates, are limited by stops.
During operation, if necessary, the control handle can be dismantled and reinstalled.
REGULATION MODE (for power drive type models):
Proportional regulation. The following actuators are applied:
- «Regada» (SP0, SP1, SP2). The actuator is operated when the power source 220 V, 50 Hz is applied. The actuators are equipped with 4 (four) position limit switches and feedback transmitter. The type of the feedback transmitter: resistive type 2000 Ohm, resistive type 100 Ohm, current type 4...20 mA.
- «Belimo» TF230-S, LF230-S, SF230A-S2; «Siemens» GMA321.1E, GCA321.1E. The actuator is operated when the power source 220 V, 50 Hz is applied. The electric power drive is equipped with the reflexive spring. When the main voltage is removed, the energy stored in the spring, retracts the motorized gas valve into initial position.
Proportional regulation. The following actuators are applied:
- «Belimo» TF230-S, LF230-S, SF230A-S2; «Siemens» GMA321.1E, GCA321.1E. The actuator is operated when the power source 220 V, 50 Hz is applied. The electric power drive is equipped with the reflexive spring. When the main voltage is removed, the energy stored in the spring, retracts the motorized gas valve into initial position.
CLIMATIC VERSION:
- -30…+50 °С – operation in irregularly heated rooms,
- -45…+50 °С – operation under roof,
- -60…+60 °С – outdoor operation (for manual type models);
MOUNTING POSITION:
- Onto horizontal and vertical pipelines.
VERSIONS:
General industrial usage
Explosion proof
Products in general industrial usage version are applied at all gas facilities where there are no special requirements to ensure the explosion safety of the electrical equipment;
Explosion-proof fitting units are applied at facilities and rooms where there are or may be formed explosive mixtures in the amount that requires special protection measures of the design, manufacture and operation of the electrical installations. To ensure safety in these zones the explosion-proof electrical equipment should be used.
Explosion-proof electrical equipment is the electrical equipment with such a construction as to eliminate the ignition of the surrounding explosive environment due to the operation of this electrical equipment.
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If you need help to select necessary equipment, you should visit our web-site or contact our specialists by e-mail info@termobrest.ru or by phone:
+375 (162) 53-64-13 (technical consultation line);
+375 (162) 53-64-76 (sales and logistics department).