Delta Elektrogas LMV Linear Control Valve

Modulating valves LMV are used in combustion processes that require linear adjustment of air or gas flow. The flow varies proportionally to the opening angle of the inner mechanism, therefore flowrate is very predictable. The valves can be operated with stage control (3-point, MZ3 servomotor) or with continuous modulation (analog signals, MZ5 servomotor)

Function and Application

LMV works using a 2-cylinder mechanism, allowing a linear variation of the flow according to mechanism position, thanks to specifically shaped gas orifices. The outer cylinder is fixed while the inner cylinder can be rotated by the actuator, opening or closing the resulting gas passage. A flow adjustment is present and can be regulated acting on an external screw to set up easily the optimal working condition of the valve. Materials and mechanical tolerances are designed to assure low leakage, repeatability of the performance and reliability.

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Specification

Connections	Threaded f/f ISO 7-1 from Rp3/8 to Rp2½
	Flanged ISO 7005 PN16 from DN40 to DN80
Control Ratio	25:1
Ambient Temperature	-15°C to +60°C (+5°F to +140°F)
Max. Working Pressure	500 mbar (50kPa)
Flow Capacity	See Datasheet
Leakage Rate	< 2% of maximum capacity
Filtering Element	600 µm
Material in contact with the gas	Aluminum alloy Brass Stainless steel Plated steel Anaerobic adhesive Nitrile rubber (NBR) Fluoroelastomer (FPM) Acetal resin (POM)
Voltage rate Servomotor MZ	230 VAC 50/60 Hz 110 VAC 50/60 Hz 24 VAC/DC (depending on servomotor type)
90° opening/closing time	7,5 ... 120 sec (depending on servomotor type)

Datasheet: Delta Elektrogas-LMV Linear Control Valve