Variable Air/Gas Ratio Control with Solenoid Valve GVRH

The GVRH solenoid valve is for precise control of the pressure and safe shut-off of the gas and air supply to gas burners and gas appliances. It is for use in gas control and safety lines in all sectors of industrial and commercial gasfired heat generation. Actuators with 24 V DC can be used for application with gas motors for instance.

Governors GV.. comply with the requirements of EN 88 class A. They are components of the MODULINE range. They can be used as individual units, and the modular construction principle of the flow bodies permits space-saving compact valve systems to be assembled individually.

A selection of different flanges for the individual sizes permits easy adaptation to various types of pipework.

Features

• Governor for gaseous media with integrated safety valve, with universal range of applications
• With gas governor class A to EN 88
• High regulating precision
• Broad outlet pressure range with only one governor spring
• No purge line required
• With gas safety valve class A to EN 161
• Suitable for cyclic operation
• Robust design, long service life
• Flexible application thanks to MODULINE design
• EC type-tested and certified

	Documentation Manufacturer's Product Brochure Manufacturer's Operating Instructions
	Ordering Information Model MODULINE size Nom. Diameter Pressure Mains Voltage Price (US List) Order Now GVRH 115/12ML02F1T3 1 15 pe max. 200 mbar 220/240 V AC, 50/60 Hz $806 GVRH 115ML02F1T3 1 15 pe max. 200 mbar 220/240 V AC, 50/60 Hz $806 GVRH 125ML02F1T3 1 25 pe max. 200 mbar 220/240 V AC, 50/60 Hz $806 GVRH 232ML02F1T3 2 32 pe max. 200 mbar 220/240 V AC, 50/60 Hz $1019 GVRH 350ML02F1T3 3 50 pe max. 200 mbar 220/240 V AC, 50/60 Hz $1386 GVRH 115/12ML02F1Q3 1 15 pe max. 200 mbar 120 V AC, 50/60 Hz $806 GVRH 115ML02F1Q3 1 15 pe max. 200 mbar 120 V AC, 50/60 Hz $806 GVRH 125ML02F1Q3 1 25 pe max. 200 mbar 120 V AC, 50/60 Hz $806 GVRH 232ML02F1Q3 2 32 pe max. 200 mbar 120 V AC, 50/60 Hz $1019 GVRH 350ML02F1Q3 3 50 pe max. 200 mbar 120 V AC, 50/60 Hz $1386
	Applications Click on images for close-up view. The governor maintains the outlet pressure constant depending on the setting of the setpoint spring or the air control pressure. Changing gas throughput and fluctuating supply pressure do not influence the regulating precision. A servo-governor module which uses the supply pressure as auxiliary power is used. This achieves far smaller dimensions than on conventional governors. Variable air/gas ratio control with solenoid valve GVRH..ML For safeguarding steplessly controlled recuperative burners with pneumatic link between gas and air and for use in systems in which the pressure ratios in the burner and combustion chamber do not change in linear fashion when subject to power variations. Function: When the solenoid valve opens, the gas flow rate is controlled. The gas flow rate follows the differential air pressure which is measured at a measuring orifice. The ratio between gas quantity and air quantity remains constant. In the min.-flow range, it is necessary, in many cases, to operate with slightly excess air owing to the lower mixing energy in order to achieve optimum combustion of the gas. This setting is performed with the aid of the governor spring. The differential pressure ratio between gas and air is 1:1.
	Specifications General Specifications Type of gas: natural gas, town gas, liquefied petroleum gas (LPG) and air Solenoid valve: class A, group 1 to EN 161 Closing time: < 1 s Switching frequency: any Ambient temperature: -20 to +60° C Valve body: aluminium Valve disc seal: Perbunan Connection flanges with female thread available: Rp to ISO 7-1 Mains voltage: 220-240 V, -15/+10%, 50/60 Hz 120 V, -15/+10%, 50/60 Hz 24 V DC, -15/+10%, DC voltage Degree of protection provided by enclosure: IP 54 to IEC 529 Power factor of solenoid coil: cos φ = 1 Duty cycle: 100% Electrical connection: terminals 2.5 mm2 or with coupler plug to ISO 4400 Measuring connection: Rp 1/8 connected to the inlet at both ends Position indicator (on GV..S/GV..G): These devices feature a microswitch for signalling "closed" or "not closed", depending on wiring of the contact sequence, and are adjusted in line with applicable standards at the works. With coupler plug to ISO 4400. Cable gland: PG 11, PG 13,5 Contact rating: 60-250 V, 50/60 Hz, max. 2 A (resistive load) Short circuit-proof: if fused up to 6.3 A, quick-acting Notes: At 24 V DC, special version with goldplated contacts required (GV..G). Contact rating at 24 V: max. 40 mA Inlet pressure pe: max. 200 mbar Air control pressure pL+: 0.2 to 100 mbar Air control pressure pL-: 0.2 to 100 mbar Differential pressure air (pL+ - pL-): 0.3 to 30 mbar Differential pressure gas (pG+ - pG-): GVRH..F1: 0.3 to 30 mbar Range of adjustment min. flow N: -5 to +5 mbar Connection of the impulse lines: compression fitting for pipe 6 × 1 mm