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Reasonable price Pneumatic Valve Remote Control System - cryogenic pneumatic control valve – Hoyee

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  • Reasonable price Pneumatic Valve Remote Control System - cryogenic pneumatic control valve – Hoyee

Reasonable price Pneumatic Valve Remote Control System - cryogenic pneumatic control valve – Hoyee

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Reasonable price Pneumatic Valve Remote Control System - cryogenic pneumatic control valve – Hoyee Detail:

Technical specification

2.1Date sheet

Pneumatic cryogenic control valve Body type: straight through casting globe type
Valve plug type: non-balanced single seat plug type
Nominal size: DN20~200,、 NPS 3/4〞~ 8〞
Nominal pressure: PN16 ~ 100、 CLASS 150LB ~ 600LB
Connection: flange: FF、RF、MF、RTJ
Welding: SW、BW
Flange dimension: According to to IEC 60534
Pneumatic cryogenic regulating valve Bonnet type: Ⅲ:Low temperature extended type（-196℃~ 45℃）
Packing: V type PFTE packing, flex. graphite packing, etc.
Gasket: Metal graphite packing
Pneumatic cryogenic regulating valveActuator: Pneumatic: multi-spring diaphragm actuator, piston type actuator.

2.2 Cryogenic control valve structure drawing

cryogenic pneumatic control valve

2.3 Cryogenic control valve material list

Component name Control Valve Material
Body/Bonnet LCB/LCC/LF2/CF8/CF8M/CF3M
Valve spool/Seat 304/316/316L(overlaying stellite alloy)
Packing Normal:-196～150℃ is PTFE
Gasket Normal:Stainless steel with flexible graphite,Special:Metal tooth type gasket
Diaphragm Cover Normal:Q235,Special:304
Diaphragm NBR with reinforced polyester fabric
Spring Normal:60Si2Mn,Special:50CrVa
Control valve stem 2Cr13/17-4PH/304/316/316L

2.4 Low temperature material suitable temperature list

Casting Forging
Materials Lowest working
temperature		 Materials Lowest working
temperature
LCB -46°C LF2 -46°C
LCC -46°C -46°C
LC1 -59°C LF5 -59°C
LC2 -73°C LF9 -73°C
LC3 -101°C LF3 -101°C
CF8 -254°C F304 -254°C
CF8M -254°C F316 -254°C
CF3 -254°C F304L -254°C
CF3M -254°C F316L -254°C

2.5  Cryogenic control valve performance

Pneumatic cryogenic regulating valve
Flow characteristic		 Linear, percentage, quick open
Allowable range 50: 1 (CV<6.3 30: 1)
Rated Cv value Percentage CV1.6~630 ，linear CV1.8~690
Pneumatic cryogenic regulating valve Allowable leakage Metal seal:  IV grade（0.01% rated capacity）
Soft seal:  VI grade（foam grade）
Leakage standard:  GB/T 4213
Pneumatic cryogenic regulating valve Performance
Intrinsic error % ±1.5
Return difference, % ≤1.5
Dead zone, % ≤0.6
Difference from beginning to end point, % ±2.5
Rated travel difference, % ≤2.5

2.6 Cryogenic control valve actuator parameter

Control Valve Type Method Pneumatic diaphragm actuator
PZMA-4~PZMA-7
Multi-spring type
Usage Regulating type, ON-OFF type
Air supply pressure or Power supply voltage Air supply pressure (Spring range)
140（20～100）Kpa G
240 (40～200) Kpa G
280 (80～240) Kpa G
Connector Air pipe connector: RC1/4
Direct action Pressure increase, stem descend, valve close.
Reaction Pressure increase, stem ascend, valve open.
Input signal 40～20mA.DC（with positioner）
Lag ≤1%FS（with positioner） 
Linear type 2%FS（with positioner）
Environmental temperature -10℃～+70℃
Pneumatic cryogenic regulating valve
Accessories		 E/P, P/P valve positioner, filter regulator, valve converter, solenoid valve, limited switch
Non-standard accessories, need special customized notes.

2.7 Cryogenic control valve technical parameter

Seat diameter(mm) 10 12 15 20 25 32 40 50 65 80 100 125 150 200
Rated Cv Percentage 1.6 2.5 4.0 6.3 10 16 25 40 63 100 160 250 400 630
Linear 1.8 2.8 4.4 6.9 11 17.6 27.5 44 69 110 176 275 440 690
Nom. size Travel Option flow characteristic Cv. (★standard  ●recommanded  ○customized)
DN20 16mm ● ● ● ★                    
DN25 ● ● ● ● ★                  
DN32 25 mm ○ ○ ○ ○ ○ ★                
DN40   ○ ○ ○ ○ ● ★              
DN50     ○ ○ ○ ● ● ★            
DN65 40mm           ○ ○ ○ ★          
DN80           ○ ○ ○ ● ★        
DN100           ○ ○ ○ ● ● ★      
DN125 60mm                 ○ ○ ○ ★    
DN150                   ○ ○ ● ★  
DN200                   ○ ○ ● ● ★
Pneumatic actuator
Diaphragm area, Ae(cm2)		 PZMA-4 PZMA-5 PZMA-6 PZMA-7
280 400 600 1000
Action Spring range Pneumatic cryogenic regulating valve
Metal sealing allowable pressure difference (MPa)
Air open 20-100KPa 4.46 3.09 1.98 1.16 0.7 0.44 0.28 0.18 0.17 0.11 0.07 0.07 0.05 0.03
40-200 KPa 6.4 6.4 5.94 3.34 2.14 1.31 0.84 0.53 0.51 0.33 0.21 0.22 0.15 0.09
80-240 KPa 6.4 6.4 6.4 6.4 4.99 3.05 1.95 1.25 1.18 0.78 0.5 0.51 0.36 0.21
Air close 20-100KPa 6.4 6.19 3.96 2.23 2.14 0.87 0.56 0.35 0.34 0.22 0.14 0.15 0.1 0.06
40-200 KPa 6.4 6.4 6.4 6.4 6.4 5.86 3.64 2.3 2.21 1.43 0.91 0.95 0.66 0.37
80-240 KPa 6.4 6.4 6.4 6.4 6.4 6.4 5.04 3.18 3.06 1.98 1.26 1.32 0.92 0.52
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