The packing for multi-stage sleeve-type control valves is PTFE packing, asbestos braided packing, or graphite packing.

Technical Parameters and Performance:

Valve Body Type: Straight-through cast ball valve

Nominal Diameter: 50, 65, 80, 100, 150, 200, 250, 300 mm

Nominal Pressure: ANSI 600, 900, 1500, 2500, JIS 40, 63K

Connection Type: Flange connection: RF, RJ, flange standard according to: JIS B2201 or ANSI B16.5

Welding Connection: Butt weld (BW); Embedded weld (SW)

Materials: ZG25 and ZG1Cr18Ni9, ZG0Cr12Mo2, 25Cr0.5Mo, 5.0Cr0.5 or SCPH21, SCPH61

Upper Valve Cover: Normal temperature type (P): -17~+230 degrees Celsius; Extended type I (E1): -45～-17 degrees Celsius, 230～566 degrees Celsius

Gland Type: Bolted type

Internal Components:

Valve Core Type: Balanced valve core

Flow Characteristics: Anti-cavitation sleeve: percentage characteristic and linear characteristic; Low noise sleeve: linear characteristic

Materials: 17-4PH, 0Cr17NiMo2 and Stellite alloy overlay

Actuator:

Type: HA Multi-Spring Diaphragm Actuator

Diaphragm Material: EPDM rubber reinforced with nylon

Spring Range: 0.08~0.24, 0.04~0.24 MPa

Air Supply Pressure: 0.28, 0.30, 0.35, 0.40 MPa

Air Supply Connector: Rc1/4

Ambient Temperature: -30~+70 degrees Celsius

Valve Action Type: Air-to-close or air-to-open

Accessories: Positioner, handwheel mechanism, pneumatic valve position transmitter, etc.

Performance:

Leakage: Meets ANSI B16.104 Class IV, less than 0.01% of rated CV

Hysteresis: 3% (without positioner); 1% (with positioner)

Linearity: ±5% (without positioner), ±1% (with positioner)

Adjustable Range: 50:1