Yueng shing Products

Pneumatic proportional control valve

Working Principle

The valve positioner receives a 4–20 mA current signal from the controller or control system, converts it into a pneumatic signal via a processor, and uses this signal to control the valve opening. Together with the valve’s regulating plug, it enables fast and precise flow regulation.

Characteristics

Easy to adjust, simple to operate, and stable in performance;

The unique adjustable cone design establishes a linear or proportional relationship between the valve’s opening/closing stroke and the flow rate, there* enabling precise and rapid flow regulation.

Precautions

During installation, if the valve body needs to be removed, re-adjust the zero point after installation is complete; do not install the valve in an inverted position.

To ensure precise adjustment, it is recommended to install the valve in the downstream direction relative to the valve seat.

Please implement adequate waterproofing measures for the positioner.

Technical Specifications

Valve Body Size	DN10-DN100	Protection Level	IP65
Connection type	Threaded, Welded, Flanged, Tri-clamp	Medium Pressure	≤1.0 MPa
Medium Temperature	-10°C to +180°C, +25°C to +220°C	Air Pressure	0.3~0.7 MPa
Ambient Temperature	0 to +55°C (Customization for high temperature available)	Control Power	24 VDC ±10%
Air quality requirements	Clean and dry air, gas quality accord with IS08573-1	Valve set signal	0/4–20 mA or 0–5/10 V
Maximum density of solid particles	10mg/m3	Power consumption	<5W
Maximum particle diameter	40 μm	Input signal impedance	0–4 mA input signal: 240 Ω; 0–5/10 V input signal: 21 kΩ
Maximum oil content	25mg/m3	Analog output signal	0/4-20mA Max load 560Ω,0-5/10V Max current 10mA

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Filling valve

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