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ZJHP fine pneumatic control valve
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Overview of ZJHP Pneumatic Single Seat Valve 
ZJHP series of pneumatic film through the single-seat control valve with a top-oriented structure , with a multi-spring actuator. With a compact structure, light weight, action sensitive, the fluid channel was 3 streamlined, the pressure drop is small, the valve capacity, the flow characteristics of precision, easy disassembly and so on. Widely used in the precise control of gas, liquid and other media, process parameters such as pressure, flow, temperature, liquid level maintained at a given value. Particularly suitable for applications that allow leakage of small valves before and after the pressure difference is not the workplace. 
This series of products are standard, adjust the cut off the valve, bellows seal type, jacket insulation and other varieties. Product nominal pressure rating PN10, 16,40,64; body diameter range DN20 ~ 300. Applicable fluid temperature from -196 ℃ ~ + 560 ℃ range of a variety of grades. Leak star standards are Class IV or VI. Flow characteristics are linear or equal percentages. Variety of specifications to choose from.

Characteristics of ZJHP Pneumatic Single Seat Control Valve 
1. Top-oriented single-seat control valve, compact structure, less parts, easy maintenance. 
2. Metal spool for a variety of work occasions, up to Class IV leakage standards, soft seal structure of the valve level of grade VI leakage. 
3. The valve body according to the principle of fluid mechanics designed to equal section low resistance flow channel, rated flow coefficient increased by 30%. Adjustable range, the inherent adjustable ratio of 50: 1. The actuator uses a multi-spring construction with a 30% reduction in height. , Weight reduction of 30%. 
4.ZJHPW bellows sealing control valve, the movement of the stem to form a complete seal, blocking fluid leakage. ZJHPJ-type control valve with a jacket, for fluid cooling after crystallization, solidification caused by clogging occasions.

Main parts commonly used materials


name Material
Valve body cover ZG230-450, ZG0Cr18Ni9
Spool seat 0Cr18Ni9,0Cr18Ni9 + PTFE, 0Cr18Ni9 + Secretary too Lai
filler PTFE, flexible graphite
Bellows 0Cr18Ni9
Gasket Graphite spiral wound gasket (V6590), toothed gasket
Membrane cover A3,0Cr18Ni9
Corrugated diaphragm Reinforced nylon fabric with nitrile rubber
spring 60Si2Mn
Stem putter 0Cr18Ni9, 2cr13



Single seat valve main technical parameters

Nominal diameter 20 25 32 40 50 65 80 100 125 150 200 250 300
Seat diameter mm 10 12 15 20 25 32 40 50 65 80 100 125 150 200 250 300
Rated kv Linear 1.8 2.8 4.4 6.9 11 17.6 27.5 44 69 110 176 275 440 690 1000 1600
Equal percentage 1.6 2.5 4.0 6.3 10 16 25 40 63 100 160 250 400 630 900 1440
Nominal pressure (MPa) 1.6, 2.5, 4.0,
Travel (mm) 16 25 40 60 100
Film effective area Ae (cm2) 280 350 560 900 1400
Signal range KPa 20-100, 40-200, 80-240
Air supply pressure MPa 0.1-0.4
Inherent flow characteristics Linear, equal percentage, quick open
Inherently adjustable 50: 1
Leakage rating Hard seal IV, V grade; soft seal VI
Flange size Complies with JB / 79. (2) _94, HG20592_97, GB, ANSI, JIB, DIN and other standards
Body material WCB, 304, 316, WC6, titanium, nickel, Hastelloy, Monel et al
Spool material 304, 316, 420, titanium, nickel, Hastelloy, Monel et al
Working temperature ℃ -40 ~ + 230 ℃ (room temperature), +250 ~ +450 ℃ (high temperature), - 40 ~ -196 ℃ (low temperature)
Series type Room temperature type, medium temperature type, low temperature type. Bellows seal type, jacket insulation type, adjust the cut off type


Key performance indicators


Serial number project Standard adjustment valve High temperature, low temperature control valve
Without locator With locator Without locator With locator
1 Basic error (%) ± 5 ± 1 ± 15 ± 4
2 Hysteresis <(%) 3 1 10 3
3 Four districts <(%) 3 0.4 8 1
4 Always Point Deviation <(%) Open air Starting point ± 2.5 ± 1 ± 6


± 2.5

end ± 5 ± 15
Gas off Starting point ± 5 ± 15
end ± 2.5 ± 6
5 Rated stroke deviation <(%) ± 2.5 +2.5 +6 +2.5


Note: The performance of this product in line with GB / T4213-2008

Pneumatic type (positive role) Metal seal type Allowable pressure table Unit: MPa

Actuator model Spring range (KPa) Air supply pressure (KPa) Locator (with / no) Seat diameter dn (mm)
20 25 32 40 50 65 80 100 125 150 200
ZHA-22 20-100 0.14 no 0.95 0.61
band 2.55 1.63
40-200 0.25 band 3.34 2.14
80-240 0.4 band 6.52 4.17
ZHA-23 20-100 0.14 no 0.49 0.32 0.20
band 1.31 0.84 0.54
40-200 0.25 band 1.72 1.10 0.71
80-240 0.4 band 3.36 2.15 1.37
ZHA-34 20-100 0.14 no 0.18 0.12 0.08
band 0.49 0.32 0.21
40-200 0.25 band 0.65 0.43 0.27
80-240 0.4 band 1.26 0.83 0.53
ZHA-45 20-100 0.14 no 0.09 0.06 0.03
band 0.23 0.16 0.09
40-200 0.25 band 0.30 0.21 0.12
80-240 0.4 band 0.58 0.40 0.22


Pneumatic type (reaction) Metal seal type Allowable pressure table Unit: MPa

Actuator model Spring range (KPa) Air supply pressure (KPa) Locator (with / no) Seat diameter dn (mm)
20 25 32 40 50 65 80 100 125 150 200
ZHA-22 20-100 0.14 With / no 0.95 0.61
40-200 0.25 band 2.55 1.63
80-240 0.28 band 5.73 3.67
ZHA-23 20-100 0.14 With / no 0.49 0.32 0.20
40-200 0.25 band 1.31 0.84 0.54
80-240 0.28 band 2.95 1.89 1.21
ZHA-34 20-100 0.14 With / no 0.18 0.12 0.08
40-200 0.25 band 0.49 0.32 0.21
80-240 0.28 band 1.11 0.73 0.47
ZHA-45 20-100 0.14 With / no 0.09 0.06 0.03
40-200 0.25 band 0.23 0.16 0.09
80-240 0.28 band 0.52 0.36 0.20


Pneumatic type (reaction) Metal seal type Allowable pressure table Unit: MPa

Actuator model Spring range (KPa) Air supply pressure (KPa) Locator (with / no) Seat diameter dn (mm)
20 25 32 40 50 65 80 100 125 150 200
ZHA-22 20-100 0.14 no 1.20 0.76
band 2.78 1.78
40-200 0.25 band 3.00 2.29
80-240 0.4 band 3.00 3.00
ZHA-23 20-100 0.14 no 0.62 0.39 0.25
band 1.44 0.92 0.59
40-200 0.25 band 1.85 1.18 0.76
80-240 0.4 band 3.00 2.23 1.42
ZHA-34 20-100 0.14 no 0.23 0.15 0.10
band 0.54 0.36 0.23
40-200 0.25 band 0.69 0.46 0.29
80-240 0.4 band 1.30 0.86 0.55
ZHA-45 20-100 0.14 no 0.11 0.08 0.04
band 0.25 0.17 0.10
40-200 0.25 band 0.32 0.22 0.13
80-240 0.4 band 0.60 0.42 0.23


Pneumatic type (positive role) Metal seal type Allowable pressure table Unit: MPa

Actuator model Spring range (KPa) Air supply pressure (KPa) Locator (with / no) Seat diameter dn (mm)
20 25 32 40 50 65 80 100 125 150 200
ZHA-22 20-100 0.14 With / no 1.19 0.76
40-200 0.25 band 2.78 1.78
80-240 0.28 band 3.00 3.00
ZHA-23 20-100 0.14 With / no 0.62 0.39 0.25
40-200 0.25 band 1.44 0.92 0.59
80-240 0.28 band 3.00 1.97 1.26
ZHA-34 20-100 0.14 With / No 0.23 0.15 0.10
40-200 0.25 band 0.54 0.36 0.23
80-240 0.28 band 1.15 0.76 0.49
ZHA-45 20-100 0.14 With / no 0.11 0.07 0.04
40-200 0.25 band 0.25 0.17 0.10
80-240 0.28 band 0.54 0.37 0.21


Note of the allowable pressure table: 
1. The packing material is PTFE 
2. The direction of the medium is opposite to that of the spool 
3. Metal seal type leakage class for the IV level 
4. Values are subject to nominal pressure, pressure, and temperature limits 
5. Bellows sealed P2 ≠ 0 to be re-checked;


Dimension and weight Unit: mm

General diameter DN 20 25 32 40 50 65 80 100 125 150 200 250 300
L PN16MPa 187 184 200 222 254 276 298 352 410 451 600 673 737
PN16MPa 194 197 210 235 267 292 317 368 425 473 600 708 775
PN16MPa 206 210 220 251 286 311 337 394 440 508 650 752 819
A 280 360 470 580
H1 PN16, 40 53 58 68 73 80 90 98 108 108 140 168 225 245
PN16, 64 63 68 75 83 88 100 105 125 125 170 203 260 280
H2 Implementing agency 280 310 395 525 725
H3 High temperature heat sink type 210 210 225 230 230 335 335 345 408 454 482 550 580
Bellows seal type 303 305 392 395 405 529 540 553 710 756 800 900 940
H Standard room temperature type 400 420 450 455 460 610 622 640 780 870 890 1205 1235
Low temperature type H3 750 900
H4 90 90 92 92 92 98 98 98 110 120 120 180 180
D 310 310 335 335 335 430 465 520 585 660 770 850 850
Weight kg PN16 / 40 20 twenty two 25 32 38 62 67 83 132 160 245 350 470
N64 / 100 twenty four 25 30 42 52 78 82 102 170 190 285 500 660
Low temperature type PN16 / 40 40 48 52 60 68 90 105 143 210 282 315 580 800
Low temperature type PN64 / 100 50 60 65 75 85 112 131 178 262 352 393 725 980


Please fill in the "specifications" or specify the following when ordering: 
First, if the order has not been selected before the model, please provide us with your use parameters 
1, nominal diameter, rated flow coefficient Kv 
2, fluid properties (including nominal pressure, temperature, viscosity or acidity) 
3, the role of valve form (gas - off or gas - open) 
4, flow was characteristics 
5, the valve before the valve pressure 
6, the valve body, core materials 
7, the input signal 
8, whether with attachments, description of the annex model, so that we for your correct selection.

Second, the special requirements 
1, special inspection 
2, completely to the oil, to the water treatment; 
3, copper treatment; 
4, special interface, piping; 
5, the use of vacuum conditions; 
6, specify the coating color 
7, special medium (gas, chlorine, nitrogen) 
8, the use of stainless steel connections;

Third, if the design unit has been selected by the company's product model, please press the model directly to our sales department ordered four, when the use of the occasion is very important or more complex pipeline, please provide you with the design drawings and detailed parameters , By our experts for your audit check.

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