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Electric low temperature control valve


Product model: DWZAZP

Nominal diameter: DN20 ~ 300mm

Nominal pressure: PN1.6 ~ 6.4Mpa

Flange standard: GB / T9113, JB / T79, HG20594

Connection method: flange (FF RF RTJ)

Applicable media: ethylene, liquid oxygen, liquid nitrogen, liquid argon, carbon dioxide, low temperature, etc

Valve body form: straight through cast spherical valve

Gland type: bolt gasket compression type

Sealing packing: V-type polytetrafluoroethylene packing, impregnated polytetrafluoroethylene asbestos packing

Valve body material: stainless steel (CF8, CF8M, CF3, cf3m)

Valve core type: single seat type, sleeve type and cage type

Material of internals: stainless steel (304, 304L, 316, 316L)



PRODUCT OVERVIEW

The electric low-temperature regulating valve is mainly used for the regulation of low-temperature liquid medium (minus - 40 ℃ ~ - 196 ℃, such as LNG, LO2, LN2 and lar). The inner cavity of the valve body and the places where all accessories contact with the low-temperature medium and the valve body are subject to low-temperature treatment. It is mainly assembled by the regulating valve body, stainless steel extension rod and multi-functional electric actuator with power supply voltage (AC220V 380V) input control signal (4-20mA DC or 1-5V DC) to adjust the medium flow on the pipeline.


PERFORMANCE CHARACTERISTICS

1. The valve body, valve core, extension rod and all components are made of stainless steel with high hardness and wear resistance;

2. All parts in contact with low-temperature medium are subject to low-temperature treatment (repeated circulation twice);

3. V-type PTFE packing is adopted, with high sealing performance to prevent valve leakage;

4. 3810l series and PSL series intelligent actuators can be configured according to requirements;

5. Wide adjustable range and high accuracy of flow characteristics.


MAIN TECHNICAL PARAMETERS

Nominal diameter(DN)20253240506580100125150200250300
Seat diameter(DN)20253240506580100125150200250300
Rated flow coefficient(KV)Single seat6.91117.627.544691101762754406308751250
Sleeve6.310162540631001552503705809001300
Allowable differential pressure(MPa)Single seat3.83.23.02.01.81.51.41.00,70.60.50.30.1
Sleeve6.46.45.25.24.64.63.73.73.53.13.12.62.2
Nominal pressure(MPa)1.6、2.5、4.0、6.4
Rated stroke(mm)16254060100
Bonnet formLow temperature type - 10 ~ - 196 ℃, ultra-low temperature type - 196 ~ - 250 ℃
Gland typeBolt compression type
Sealing packingV-type PTFE packing, V-type flexible graphite packing
Spool formSingle seat type, sleeve type
Flow characteristicsEqual percentage, linear
Configure actuator category3810l series, PSL series and other electric actuators (customers can also specify brands)
Actuator parametersPower supply voltage: 220V, input signal: 4-20mA or 1-5V · DC, output signal: 4-20mA · DC
Protection grade: equivalent to IP65, flameproof sign: Exd Ⅱ BT4 (Exd Ⅱ BT6 specially customized), manual operation function: handle
Ambient temperature: - 25 ~ + 70 ℃, ambient humidity: ≤ 95%


MATERIAL OF MAIN PARTS

1Valve bodyWCB304316316L
2shimPTFE\Graphite gasketPTFE\Graphite gasketPTFE\Graphite gasketPTFE\Graphite gasket
3

Seat / sleeve

304304316316L
4spool304304316316L
5Guide sleeve / cap304304316316L
6Middle cushionPTFE\Graphite gasketPTFE\Graphite gasketPTFE\Graphite gasketPTFE\Graphite gasket
7Valve coverWCB304316316L
8Valve stem304304316316L
9Heat shieldcarbon steel304316316L
10fillerPTFE/graphitePTFE/graphitePTFE/graphitePTFE/graphite
11Bolt25Stainless steelStainless steelStainless steel
12Packing glandWCB304316316L


MAIN PERFORMANCE INDEXES

Deviation from starting point%

Project Index value
Basic error% Prepare 3810l ± 2.5; With PSL ± 1.0
Return difference% Prepare 3810l ± 2.0; With PSL ± 1.0
Deadband% 1.0
Power on Starting point ± 2.5 End point ± 2.5
Starting point ± 2.5 终点±2.5
Power off Starting point ±2.5
End ±2.5
Rated stroke deviation% ≤2.5
Leakage L / h 0.01% × Valve rated capacity
Adjustable range R 30：1


MAIN OUTLINE AND CONNECTION DIMENSIONS

Nominal diameter(DN)20253240506580100125150200250300
LPN16/25181184200222254276298352410451600640880
PN40194197200235267292317368425473610760910
PN64206200210251286311337394440508650810950
HPN16/2552.557.5757585.592.5100110142.5158170195230
PN4052.557.5757582.592.5100117.5150167.5187.5205245
PN646540858590102.5107.5125172.5195207.5230260
H1Design the extension rod size of electric low temperature regulating valve according to the actual minimum temperature on site
H23810L373373495495495700700700725725725725725
PSL465465465465465560560560560560788788788
D3810L225225225225225257257257310310310310310
PSL177177177177177182182182182182218218218

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