Pneumatic Globe Valve DN50 Price, Automation Control System
Factors Affecting the Price of Pneumatic Globe Valve DN50
Currently, the price of a pneumatic globe valve DN50 generally ranges from RMB 1,600 to RMB 4,800. The specific price is influenced by the following factors:
Valve Body Material: Cast steel (WCB) costs approximately RMB 1,600-2,600; stainless steel (304/316) costs RMB 2,400-4,000; chrome-molybdenum steel (WC6/WC9) for high temperatures costs RMB 3,200-4,800.
Seal Type: PTFE soft seal costs RMB 1,600-2,800, suitable for clean media; STL hard seal costs RMB 2,200-3,800, offering erosion resistance and high temperature resistance.
Pneumatic Actuator Configuration: Double-acting actuator costs RMB 1,600-2,600; single-acting (spring return) is 30%-50% higher in price.The main stop valve product names of China Stop Valve Network include:ANSI Flange Straight-through Bellows Globe Valve,Forged Steel Straight-through Globe Valve,Flange Straight-through Low Temperature Globe Valve,High Temperature and Pressure Power Station Electric Globe Valve,Oxygen-specific Globe Valve,Vacuum Isolated Straight-through Globe Valve,Y-type Jacket Insulation Globe Valve,GB Bellows Globe Valve.
Accessories Configuration: Adding solenoid valve, limit switches, air treatment unit, and electric positioner (modulating type) increases the total price by 40%-80%.
Automation Control System Integration
Pneumatic globe valves are typically used with PLC or DCS systems. The control principles are as follows:
On/Off Type: The DCS outputs a digital signal to drive the solenoid valve to reverse direction, controlling the cylinder action to achieve fully open or fully closed valve position.
Modulating Type: The DCS outputs a 4-20mA signal to an electric positioner, which precisely controls the valve stem stroke to achieve continuous flow regulation.
Interlock Protection: Working with pressure or temperature transmitters, it achieves automatic shut-off when limits are exceeded, ensuring process safety.
Purchasing Suggestions
It is recommended that users comprehensively select materials and accessory configurations based on medium characteristics, working pressure (PN16/40 or Class 150/300), and control accuracy requirements. When purchasing, confirm that the valve complies with GB/T 12235 standards, and provide the air supply pressure (typically 0.4-0.7 MPa) and control mode. It is advisable to request quotes from at least three professional pneumatic valve manufacturers for comparison.
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