ZMAX (Q) series of pneumatic membrane three-way control valve with double spool up and down guide structure, with a multi-spring actuator, the valve body for the four-way structure, that is, one into the two (split type), two into a (confluence ), So as to achieve fluid mixing temperature or cooling effect, or fluid ranging from diversion, to meet the requirements of different working conditions. The valve body has a compact structure, in the light, sensitive action, the pressure drop loss is small, allowing the pressure of the new high, the valve was large, the flow was characterized by precision and easy maintenance, etc., can be used for a variety of different working conditions, It is suitable for the temperature control system of oil industry heat exchangers and the automation control of other industries. The valve has a (sub) flow of ordinary type, combined (sub) high temperature type and other types. Product nominal pressure class households PN1.6,4.0,6.4; valve body diameter range DN25 ~ 400; leakage grade II, IV level; flow characteristics were straight and equal percentage. Variety of specifications to choose from.

Main parts commonly used materials

Name Material

Body ZG230-450, ZG0Cr18Ni9

Spool valve seat 0Cr18Ni9,0Cr18Ni9 + PTFE, 0Cr18Ni9 + Secretary too Lai

Stem 0Cr18Ni9,2Cr13

Putter 0Cr18Ni9, 2Cr13

Spring 60Si2Mn

Bellows 0Cr18Ni9

Corrugated film holder reinforced nylon fabric Nitrile rubber

Film cover A3,0Cr18Ni9

Gasket 0Cr18Ni9, graphite spiral wound gasket (V6590), F4

Filler PTFE, flexible graphite 

The main technical parameters of the three - way valve

Nominal diameter 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

Rated KV 8.5 13 21 34 53 85 135 210 340 535 800 1280 1960 2560

Nominal pressure (MPa) 1.6,2.5,4.0,6.4

Stroke (mm) 16 25 40 60 100 130

Effective area of film

(Cm2) 280 350 560 900 1400 Piston type

Signal range KPa 20-100,40-200,80-240

Air supply pressure MPa 0.1-0.4 0.4-0.7

Inherent flow characteristics linear, equal percentage, quick open

Inherently adjustable ratio of 30: 1

Leakage class III, IV

Flange size in line with JB / 79. (2) _94, HG20592_97, GB, ANSI, JIB, DIN and other standards

Body material WCB, 304,316, WC6, titanium, nickel, Hastelloy, Monel and so on

Spool material 304,316,420, titanium, nickel, Hastelloy, Monel and so on

Working temperature ℃ -40 ~ + 230 ℃ (room temperature), +230 ~ +450 ℃ (medium temperature), +450 ~ +560 ℃ (high temperature), - 40 ~ -196 ℃ (low temperature)

Series type of room temperature type, medium temperature type, low temperature type. Bellows seal type, jacket insulation type, adjust the cut off type

 

 

ey performance indicators

Serial number project performance index

Without locator with locator

1 Basic error (%) ± 5 ± 1

2 hysteresis <(%) 3 1

3 four areas <(%) 3 0.4

4 End point deviation <(%) Starting point (%) ± 5 ± 1

 

End point (%) ± 2.5

5 Rated stroke deviation <(%) ± 2.5

6 Allowable leakage (1 / h) 10-3 * Valve rated capacity

7 Rated flow coefficient deviation <(%) ± 10

8 The inherent flow characteristics conform to the slope deviation requirements specified in IEC534-1 and GB / T4213-92

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

 

 

Common diameter DN (mm) 25 32 40 50 65 80 100 125 150 200 250 300

L PN1.6MPa 185 200 220 250 275 300 350 410 450 550 670 700

PN4.0MPa 190 210 230 255 285 310 355 425 460 560 740 803

PN6.4MPa 200 200 240 265 295 320 370 440 475 570 752 819

H1 135 152 165 180 200 220 222 265 322 362 508 563

A 280 360 470 580

At room temperature 702 718 795 830 1067 1080 1094 1293 1321 1400 2065 2151

H Medium temperature type 832 818 925 960 1214 1243 1257 1492 1520 1597 2340 2432

Weight (PN64 room temperature) 40 45 60 65 100 125 150 250 290 450 - -

Ordering instructions

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 order

Fourth, 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.