Pneumatic diaphragm globe control valve CF8

This industrial grade ZJHP pneumatic diaphragm control valve is manufactured from premium CF8 stainless steel, precisely engineered for high temperature steam, gas, and thermal oil applications. Equipped with a heavy duty multi spring diaphragm actuator and a smart electro pneumatic positioner, it responds accurately to four to twenty mA control signals. This ensures reliable, automatic, and highly accurate proportional modulating regulation of pipeline pressure, temperature, and volumetric flow rates.

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The ZJHP series pneumatic diaphragm single seated globe control valve is an ideal automated solution for high accuracy fluid management within complex industrial process plants Featuring a top guided contoured plug design inside a robust CF8 stainless steel body this assembly delivers excellent resistance to cavitation and erosion Under the precise command of a side mounted electro pneumatic positioner the multi spring diaphragm actuator adjusts the valve stroke smoothly to maintain perfect equal percentage or linear flow characteristics This high performance package guarantees stable automatic flow calibration low seat leakage and long term operational reliability across demanding steam networks and corrosive liquid chemical refining pipelines

Technical Specifications

Valve Design Classification Pneumatic Multi Spring Diaphragm Single Seated Globe Control Valve
Body Material Construction Premium Stainless Steel CF8 ASTM A351 Precision Casting
Actuator Operational Drive Heavy Duty Pneumatic Diaphragm Actuator with Internal Springs
Valve Positioning Instrument Intelligent Electro Pneumatic Positioner for Modulating Control
Command Input Signal 4 to 20 mA DC Analogue Electronic Control Input
Pneumatic Instrument Air Supply 0.14 to 0.40 MPa Clean and Dry Industrial Compressed Air
Nominal Pipe Dimension DN 50 or 2 inch equivalent flanged line size
Main Pipe Pressure Rating PN 16 Nominal Working Pressure 1.6 MPa equivalent
Internal Trim Configuration Top Guided Single Seated Equal Percentage Contoured Plug Profile
Seat Leakage Performance Complanged with ANSI FCI 70 2 Class IV Sealing Standards
Main Pipeline Connection RF Raised Face Flanged Ends for Secure Bolted Installation
Main Flange Geometry Standard EN 1092 1 DIN 2501 Flange Clearance Dimensions
Stem Sealing Construction High Performance V Ring PTFE or High Temperature Flexible Graphite Packing
Flow Characteristic Curve Equal Percentage or Linear Operational Modulating Configurations
Actuator Diaphragm Material Durable NBR Rubber with Internal High Strength Nylon Fabric Reinforcement
Air Conduit Joint Connection Threaded Female G 1 4 inch or NPT Instrument Air Ports
Surface Exterior Treatment Natural Stainless Steel Shot Blasting with High Visibility Actuator Coating
Maximum Safe Working Temperature 230 degrees Celsius with PTFE or 425 degrees Celsius with Graphite Packing
Primary Media Suitability Saturated Steam Superheated Steam Hot Thermal Oil Water and Chemical Gases
Pressure Testing Verification Factory Hydrostatic Shell Pressure and Control Seat Tightness Calibration
Quality Management Certificate Manufactured and Tested in Strict Compliance with ISO 9001 Standards