KAX series of pneumatic three-way control valve, pneumatic three-way valve three-way valve, the use of double spool up and down guide structure, usually used in the heat exchanger, according to the use can be divided into diversion regulation (one into two) Type (two into a), fast cut off type.

Product specification 

Specification Name Industrial Control Valve Structure Length Flange Standard Pneumatic Regulator Pressure Level

International Standard IEC 60534-1 IEC 60534-3-1 ASME B16.5 IEC 60534-4 ASME B16.34

National standard GB / T17213 GB / T17213.3 JB / T79, HG / T20592 GB / T4213 GB / T9131

Main parameters of the valve body 

Form T-type tee

Nominal diameter DN25 ~ DN400

Nominal pressures PN16, 40, 63, ANSI CL150, 300, 600

Body cover material WCB, WC6, WC9, CF8, CF8M, HC276, Ti alloy, etc.

Trimmer material 304,316, HC276, Ti alloy and so on

Filled PTFE V-shaped, flexible graphite, PTFE packing, flexible graphite clip nickel wire

Actuator pneumatic, electric

And actuator connection bolt compression type, round nut lock type

Bonnet type standard type, high temperature type (heat sink), bellows type

Connection type Flange type (RF, MFM, RJ), welding type (SW, BW)

The flange is as follows

Operating temperature -29 ~ +230 (standard), +230 ~ +560 (medium temperature)

Leakage Level ANSI B16.104 IV, VI, Zero Leakage

Flow characteristics Linear, parabolic

Inherently adjustable ratio of 30: 1 

Valve structure length (flange distance) 

Nominal diameter 20 25 32 40 50 65 80 100 125 150 200 250 300

Flange distance L PN16, 25/185 200 220 250 275 300 350 410 450 550 670 700

PN40 / 190 210 230 255 285 310 355 425 460 560 740 803

PN63,100 / 300 220 240 265 295 320 370 440 475 570 752 819

Rated flow coefficient and stroke

Nominal diameter 20 25 32 40 50 65 80 100 125 150 200 250 300

Seat diameter 20 25 32 40 50 65 80 100 125 150 200 250 300

Rated Cv linear / 8.5 13 21 34 53 85 135 210 340 535 800 1280

Equal percentage

Rated travel 16 25 40 60 100

Note: Nominal diameter DN300 above see the large diameter control valve

Installation Precautions

The new design and installation of the control system, in order to ensure that the control valve in the car to work properly, and make the system safe operation, the new valve before installation, should first check the valve nameplate logo is consistent with the design requirements. The following items should also be commissioned: basic error limit; full trip deviation; hysteresis; dead zone; leakage (in demanding cases).

If the original system of the control valve overhaul, in addition to the above items for verification, but also the old valve stuffing and connection and other parts of the sealing check.

In the use of control valve, many are often not due to the quality of the control valve itself, but the improper use of the installation of the valve caused by, such as the installation environment, improper installation location and direction or the pipeline is not clean and other reasons. So the control valve in the installation of the use of attention to the following aspects:

(1) regulating valve is a field instrument, the ambient temperature should be in the range of -25 ~ 60 ℃, relative humidity ≤ 95%. If it is installed in open air or high temperature occasions, should take waterproof, cooling measures. In a place where there is a source away from vibration sources or increase anti-vibration measures.

(2) regulating valve should be installed vertically, in particular, can be tilted, such as the tilt angle or the valve itself is too large when the weight of the valve should be increased support.

(3) the installation of the valve control valve is generally not too far from the ground or the floor, the pipe height greater than 2m should try to set the platform to facilitate the operation of hand wheel and easy maintenance.

(4) the control valve should be installed before the pipeline cleaning, remove dirt and welding slag. After installation, in order to ensure that no impurities remain in the valve body, the valve should also be cleaned again, that is, access to the media should make all the valve open, so as not to impurity stuck. After using the handwheel mechanism, it should be restored to the original neutral position.

(5) In order to make the control valve in the event of failure or maintenance of the production process can continue, the control valve should be bypassed pipeline, but also should pay special attention to the installation of the valve position is consistent with the requirements of the process.

(6) The electrical installation of the control valve shall be carried out in accordance with the relevant electrical equipment construction requirements. If the flameproof products should be "explosion hazard electrical equipment installation specifications" requirements for installation. In the use of maintenance, in the explosive place is strictly prohibited to open the lid and repair the surface of the explosion. At the same time in the disassembly do not knock or scratch the exposed surface, after repair to restore the original explosion-proof requirements of the state.

(7) after the implementation of the agency should pay attention to refueling lubrication, low-speed motor generally do not wash and refuel. After assembly should also check the valve position and valve opening indicator is consistent.