CN HDFM - Valve Information, Valve Technology

China’s chemical fertilizer industry with the H22-type hydrogen nitrogen over 30 ring compressor valves, valve failure due to become the current outstanding problems in the compressor.

To address this problem, the valve manufacturer for the life of valve failure analysis and statistics, found that many still use the valve was replaced, the main reasons are:

1. Lift limiter valve on the radial block a lot of wear and tear guide so that the valve and the guide block between the gap of about 0.2mm into a 1mm ~ 2mm (see Figure 1), so the valve can not fall after exercise deviates from the correct position of the valve seat sealing surface. Especially high-pressure section of the valve.

Solution: Replace the worn out the lift limiter.

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Posted in Technical Literature | Tagged Air valve

Sanitary pneumatic control valve for various pressure, temperature, flow, and other physical conditioning, such as food, pharmaceutical, cosmetic, clean steam, alcohol, beverage, chemical and biological industrial process control applications. Multi-spring diaphragm actuator and the sanitary control valve body composition, sanitary pneumatic control valve with a compact, easy assembly and disassembly, regulation and high precision, especially in the pressure drop, flow rate, adjustable wide range of flow high precision, fully comply with IEC534-1978 standard, the valve leakage meet ANSI B16.104 standards.

Sanitary pneumatic control valve designed to ensure the use of angle from the discharge valve, standard electronic polished, smooth surface to ensure clean and free of media accumulation area, no potential contamination. Quick disassembly Body and bonnet of the valve to open and repair quick and easy, making the process downtime.

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Posted in Technical Literature | Tagged Performance parameters • Pneumatic regulating valve • Regulating valve

1. Role of Self-Control Valve

Self-regulating valve are using the output feedback signal valve (pressure, pressure, temperature) to pass through the signal tube to the valve actuator drive change in the valve opening, to adjust the pressure, flow, temperature.

2. Self-regulating valve of the advantages of

Self-regulating valve is a new type of self-regulating valve. Compared to manual control valve, it has the advantage is the ability to automatically adjust; relative to the electric control valve, which has the advantage of no external power. Application proved that the closed-loop water system (such as hot water heating systems, air conditioning chilled water system), the proper use of this valve, the system can easily achieve the flow distribution; can achieve the dynamic balance of the system; can greatly simplify the debugging; can stabilize the pump working status.

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Posted in Technical Literature | Tagged Regulating valve

Abstract: The pneumatic control valve selection factors. According to chemical production process conditions, select the appropriate structure and type of control valve; according to the process object, select the appropriate flow characteristics; according to process parameters, calculation of flow coefficient, select the control valve bore; according to process requirements, selection of materials and auxiliary equipment.

Keywords: control loop; pneumatic control valve; options

Modern chemical industry, high level of automation in process control, actuator control quality and production conditions of stability are closely linked, so the choice of the actuator is particularly important, safety explosion-proof requirements for the chemical industry is relatively high , the vast majority is used in pneumatic actuator control valve.

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Posted in Technical Literature | Tagged Pneumatic regulating valve • Regulating valve • Valve selection