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Overview of ZMAN pneumatic double seat control valve
ZMAN series pneumatic thin fat through engine valve dual oriented structure, equipped with multi spring actuator. Has the advantages of compact structure, surface light, sensitive action, low loss, pressure drop description allows a large pressure difference, valve capacity, flow characteristics of Trichosanthes really, convenient maintenance and so on, can use dry harsh working conditions. Especially suitable for the valve pressure difference, workplace requirements without leakage. This series of products are the standard type, adjust the cut-off valve, bellows seal type, jacket type insulation and other varieties. Nominal grade products are PN10, 16, 40, 64; body diameter range of DN20~300. Application of fluid temperature from -196 ℃ ~+560 ℃ range of different grades. Leakage star standard with IV or VI. Flow characteristics such as linear or percentage. A variety of different specifications can be selected.
Materials of main parts
| Name | Texture of material |
| The valve body valve cover | ZG230-450、ZG0Cr18Ni9 |
| Valve seat | 0Cr18Ni9, 0Cr18Ni9+PTFE, 0Cr18Ni9+ division Chatterley |
| Filler | PTFE, flexible graphite |
| Corrugated | 0Cr18Ni9 |
| Shim | Graphite spiral wound gasket (V6590), F4 |
| Film cover | A3、0Cr18Ni9 |
| Corrugated diaphragm | Clip reinforced nylon fabric nitrile rubber |
| Spring | 60Si2Mn |
| Valve push rod | 0Cr18Ni9、2cr13 |
The main technical parameters of the valve seat
| DN | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | ||||||||||||||||||
| Seat diameter mm | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | ||||||||||||||||||
| Ratedkv | 10 | 16 | 25 | 40 | 63 | 100 | 160 | 250 | 400 | 630 | 1000 | 1600 | 1960 | 2560 | ||||||||||||||||||
| Nominal pressure（MPa） | 1.6、2.5、4.0、6.4 | |||||||||||||||||||||||||||||||
| Trip（mm） | 16 | 25 | 40 | 60 | 100 | 130 | ||||||||||||||||||||||||||
| The effective area of the film Ae（cm2） | 280 | 350 | 560 | 900 | 1400 | Piston type | ||||||||||||||||||||||||||
| Signal range KPa | 20-100、40-200、80-240 | |||||||||||||||||||||||||||||||
| Gas pressure steam source MPa | 0.1-0.4 | 0.4-0.7 | ||||||||||||||||||||||||||||||
| The inherent flow characteristics | Linear, equal percentage, quick opening | |||||||||||||||||||||||||||||||
| The inherent adjustable ratio | 50:1 | |||||||||||||||||||||||||||||||
| The leakage class | Hard seal, soft seal IV V; VI | |||||||||||||||||||||||||||||||
| Flange size | According to JB/79. (2) _94, HG20592_97, GB, ANSI, JIB, DIN and other standards | |||||||||||||||||||||||||||||||
| Body material | WCB, 304, 316, WC6, nickel, titanium, Hastelloy, Monel etc. | |||||||||||||||||||||||||||||||
| Valve material | 304, 316, 420, nickel, titanium, Hastelloy, Monel etc. | |||||||||||||||||||||||||||||||
| Working temperature ℃ | -40~+230 ℃ (room temperature), +230~+450 ℃, +450~+560 ℃ (Zhong Wen) (high temperature), -40~-196 ℃ (low temperature) | |||||||||||||||||||||||||||||||
| Series type | at room temperature, medium temperature, low temperature type. Bellows seal type, jacket type heat, regulating off type | |||||||||||||||||||||||||||||||
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Main performance index
| Serial number | Project | Standard type regulating valve | High temperature, low temperature valve | ||||
| Not with a locator | With a locator | Not with a locator | With a locator | ||||
| 1 | The basic error（%） | ±5 | ±1 | ±15 | ±4 | ||
| 2 | The return difference<（%） | 3 | 1 | 10 | 3 | ||
| 3 | The dead zone <（%） | 3 | 0.4 | 8 | 1 | ||
| 4 | Always point bias <（%） | Open air | The starting point | ±2.5 | ±1 | ±6 |
±2.5 |
| Finish | ±5 | ±15 | |||||
| Air to close | The starting point | ±5 | ±15 | ||||
| Finish | ±2.5 | ±6 | |||||
| 5 | Rated stroke deviation <（%） | ±2.5 | +2.5 | +6 | +2.5 | ||
Gas off type (positive effect) metal sealing type allows differential pressure gauge Company： MPa
| The executive agency model | Spring range（KPa） | Air 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 | Whether or not | 0.92 | 0.72 | |||||||||
| Belt | 5.50 | 4.33 | ||||||||||||
| 40-200 | 0.25 | Belt | 6.40 | 6.14 | ||||||||||
| 80-240 | 0.4 | Belt | 6.40 | 6.40 | ||||||||||
| ZHA-23 | 20-100 | 0.14 | Whether or not | 0.73 | 0.58 | 0.46 | ||||||||
| Belt | 4.40 | 3.49 | 2.77 | |||||||||||
| 40-200 | 0.25 | Belt | 6.24 | 4.94 | 3.92 | |||||||||
| 80-240 | 0.4 | Belt | 6.40 | 6.40 | 6.40 | |||||||||
| ZHA-34 | 20-100 | 0.14 | Whether or not | 0.55 | 0.44 | 0.35 | ||||||||
| Belt | 3.27 | 2.64 | 2.10 | |||||||||||
| 40-200 | 0.25 | Belt | 4.63 | 3.75 | 2.98 | |||||||||
| 80-240 | 0.4 | Belt | 6.40 | 6.40 | 6.40 | |||||||||
| ZHA-45 | 20-100 | 0.14 | Whether or not | 0.48 | 0.40 | 0.30 | ||||||||
| Belt | 2.90 | 2.41 | 1.80 | |||||||||||
| 40-200 | 0.25 | Belt | 4.11 | 3.42 | 2.55 | |||||||||
| 80-240 | 0.4 | Belt | 6.40 | 6.40 | 5.56 | |||||||||
Air to close (reaction) metal sealing type allows differential pressure gauge Company： MPa
| The executive agency model | Spring range（KPa） | Air pressure（KPa） | Locator (with / no) | 阀座直径dn(mm) | ||||||||||
| 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | ||||
| ZHA-22 | 20-100 | 0.14 | no | 0.92 | 0.72 | |||||||||
| 40-200 | 0.25 | Belt | 5.51 | 4.33 | ||||||||||
| 80-240 | 0.28 | Belt | 6.40 | 6.40 | ||||||||||
| ZHA-23 | 20-100 | 0.14 | no | 0.73 | 0.58 | 0.46 | ||||||||
| 40-200 | 0.25 | Belt | 4.41 | 3.49 | 2.77 | |||||||||
| 80-240 | 0.28 | Belt | 6.40 | 6.40 | 6.40 | |||||||||
| ZHA-34 | 20-100 | 0.14 | no | 0.55 | 0.44 | 0.35 | ||||||||
| 40-200 | 0.25 | Belt | 3.27 | 2.65 | 2.11 | |||||||||
| 80-240 | 0.28 | Belt | 6.40 | 6.40 | 5.63 | |||||||||
| ZHA-45 | 20-100 | 0.14 | no | 0.48 | 0.40 | 0.30 | ||||||||
| 40-200 | 0.25 | Belt | 2.90 | 2.41 | 1.81 | |||||||||
| 80-240 | 0.40 | Belt | 6.40 | 6.40 | 4.82 | |||||||||
Note that allows differential pressure gauge:
1 packing material for the PTFE
Flow valve 2 medium off in the opposite direction
Leakage in grade IV 3 metal seal type
4 numerical by nominal pressure, pressure, temperature limits
The 5 bellows seal type P2 ≠ 0 re check;
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Dimensions and weight Company：mm
| All diameter DN | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | ||
| L | PN1.6MPa | 185 | 200 | 220 | 250 | 275 | 300 | 350 | 410 | 450 | 550 | 670 | 770 | |
| PN4.0MPa | 190 | 210 | 230 | 255 | 285 | 310 | 355 | 425 | 460 | 560 | 740 | 805 | ||
| PN6.4MPa | 200 | 220 | 240 | 265 | 295 | 320 | 370 | 440 | 475 | 570 | 750 | 820 | ||
| A | 280 | 360 | 470 | 580 | ||||||||||
| H1 | PN16、40 | 112 | 118 | 130 | 144 | 178 | 192 | 195 | 245 | 255 | 290 | 441 | 503 | |
| H2 | Actuator | 280 | 310 | 395 | 525 | 725 | ||||||||
| H3 | High temperature heat sink type | 235 | 250 | 256 | 368 | 365 | 384 | 394 | 465 | 470 | 540 | 680 | 730 | |
| Bellows seal | 364 | 425 | 430 | 445 | 660 | 680 | 690 | 748 | 740 | 780 | 900 | 940 | ||
| H | Standard room temperature | 435 | 455 | 490 | 510 | 630 | 645 | 655 | 855 | 875 | 945 | 1400 | 1600 | |
| Low temperature type | H3 | 750 | 900 | |||||||||||
| H4 | 92 | 92 | 92 | 92 | 98 | 98 | 98 | 110 | 120 | 120 | 180 | 180 | ||
| D | 355 | 355 | 355 | 390 | 430 | 465 | 520 | 585 | 660 | 770 | 850 | 850 | ||
| Weight kg | PN16/40 | 26 | 28 | 37 | 43 | 67 | 71 | 88 | 136 | 168 | 260 | 560 | 670 | |
| N64/100 | 30 | 35 | 47 | 58 | 84 | 88 | 109 | 179 | 202 | 305 | 680 | 840 | ||
| Low temperature type PN16/40 | 51 | 55 | 65 | 74 | 95 | 110 | 149 | 218 | 295 | 325 | 640 | 760 | ||
| Low temperature type PN64/100 | 64 | 69 | 69 | 93 | 119 | 138 | 186 | 273 | 369 | 406 | 800 | 950 | ||
When ordering, please fill in "specification" or indicate the following contents:
One, if the order has not selected models, please provide the parameters are used to send us your
1, nominal diameter, nominal flow in coefficient Kv
2, the fluid properties (including the nominal pressure, temperature, viscosity and pH value "
3, the valve action form (gas closed or gas - Open)
4, flow at
5, in front of the valve, the valve pressure
6, valve body, broad core material
7, the input signal
8, with the attachment, the attachment type, so that we can correct for your selection.
Two, special requirements
1, special inspection
2, complete degreasing, water treatment;
3, no copper processing;
4, special interface, piping;
5, the use of vacuum conditions;
6, specify the color of the coating
7, special medium (gas, chlorine, nitrogen)
8, the use of stainless steel connections;
Three, if the unit has been selected from the design of our products, please click models directly to our sales department order
Four, the occasion is very important when using or complicated pipelines, please make cocoons provide design drawings and detailed parameters, from our experts to your review gatekeeper.
Note: This product performance accords with GB/T4213 - 2008
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