Pneumatic sleeve regulating valve ZJHM-16C

Product Features

Sleeve-guided; stable throttling; optional valve positioner.

Model number

ZJHM-16C

Specification and caliber

DN25-DN300

Pressure level

PN16/PN25/PN40

Material

WCB/CF8/CF8M

Product Introduction

ZJHM-16C Pneumatic Sleeve Regulating Valve

Pneumatic sleeve regulating valve ZJHM-16C is used for automatic switching or process control in steam pressure reduction, chemical processes, energy systems, and continuous flow control. The selection should check the medium, temperature, maximum and normal flow rates, pressure difference before and after the valve, pipeline standards and control requirements, and should not be based solely on the existing pipe diameter. This article lists the commonly used configuration range, and the final data should be based on project conditions, order confirmation forms, and manufacturing drawings.

Structure and Drive

ZJHM-16C adopts a straight through sleeve guide, balanced valve core, and flange connection. When fluid passes through the valve body flow channel, the position of the opening and closing components is changed by a multi-spring pneumatic diaphragm actuator to complete cutting or adjustment. The actuator should match the torque or thrust of the valve and reserve a reasonable safety factor. When feedback, positioning, or interlocking is required, the control signal, power or gas source, protection level, and fault safety location should be clearly defined during the ordering phase to avoid on-site interface mismatch.

Material and sealing

The commonly used caliber is DN25-DN300, the pressure rating is PN16/PN25/PN40, and the valve body material can be selected as WCB/CF8/CF8M. The selection of materials should take into account the corrosiveness of the medium, chloride ions, temperature fluctuations, and cleaning conditions. Metal seals or soft seals should be confirmed according to the leakage level, and their allowable temperature, pressure difference, and leakage level should be checked simultaneously. For steam, particle containing, easily crystallized or frequently operated conditions, the hardness of valve internals, packing form and erosion prevention measures should also be confirmed.

Product Specifications

Product Model	ZJHM-16C
Structural form	Straight through sleeve guide, balanced valve core, flange connection
Nominal Diameter	DN25-DN300
pressure rating	PN16/PN25/PN40
Valve body material	WCB/CF8/CF8M
sealing form	Metal seal or soft seal, confirmed according to leakage level
Drive Type	Multi-spring pneumatic diaphragm actuator
Applicable temperature	-29℃ to 425℃, confirm according to the valve internals
Applicable Medium	Steam, gas, water, and clean process media

Applicable working conditions

With a suitable configuration, the valve can be used for steam pressure reduction, chemical processes, energy systems and continuous flow control. Dangerous areas should select corresponding actuators, accessories, and wiring methods according to explosion-proof zones; Food, pharmaceutical and other systems also need to confirm the requirements for liquid receiving materials, surface treatment and cleaning. Projects involving oxygen, highly corrosive or toxic media should undergo specialized material and safety reviews.

Installation and Debugging

Before installation, the nameplate, flow direction, and connection standards should be checked, and welding slag and hard debris should be removed to ensure the concentricity of the front and rear pipe sections and avoid the transmission of pipeline stress to the valve body. Maintain maintenance space around the actuator, and prevent rainwater from entering the cable entrance; Pneumatic accessories should use a clean and dry air source. The first debugging should check the switch position, stroke feedback, interlocking logic, and sealing condition under low-risk conditions, and then gradually enter the working pressure.

Operation and maintenance

Observe action time, abnormal noise, leakage, valve position feedback, and control signals during operation. When the action is slow, first check the power or gas source, wiring, filter pressure reducing valve, and actuator, and then check the valve stem, valve seat, and seals. It is not advisable to blindly increase the driving force. Before maintenance, it is necessary to isolate the medium, relieve pressure, and confirm that there is no residual energy. After replacing the seal, conduct strength, sealing, and action tests according to regulations, and record the material of the spare parts and the date of maintenance.

Q&A on the selection of pneumatic sleeve regulating valve

ZJHM-16C is used for larger pressure differentials, do we still need to choose specialized valve internals?

Need. Please provide the upstream and downstream pressure, medium temperature, and flow range to assess the risks of noise, cavitation, flash evaporation, and erosion. The name of sleeve or cage does not equal the already configured multi-stage pressure reducing or anti cavitation valve internals, and the specific plan should be confirmed according to the working conditions.

Do I need to confirm the input signal and valve position feedback when connecting ZJHM-16C to DCS?

It is necessary to confirm the control input, valve position feedback, power or gas source conditions, interfaces, and fault location separately. Input and feedback are not the same function, and it cannot be assumed that all analog signals or communication protocols are fully equipped based solely on the name "regulating type".

ZJHM-16C needs to be turned off after gas interruption. How should the actuator be configured?

The safety position required for the process in case of gas loss should be clarified first, and then the single or double acting scheme, output force or torque, and accessory circuit should be checked. You cannot select cylinders based solely on valve diameter, nor can you assume that all pneumatic configurations will close when there is a loss of air.

Selection and ordering information

Suggest providing the composition of the medium, design and operating temperature, maximum and normal pressure, flow range, pipeline standards, operating frequency, control signals, power or gas supply conditions, fail safe location, and environmental protection requirements. Fouten Flow Control (Jiangsu) Co., Ltd. will verify the caliber, material, seal, actuator, and accessory combination based on this, providing traceable basis for installation and maintenance.