Pneumatic V type regulates the ball valve

Product introduction:

First, detailed materials of the product [ regulates the ball valve ]: Type of the products: SMVQ671F Name of product: Pneumatic V type regulates the ball valve Characteristic of the products: It is a kind of right angle turning round type regulating valve to regulate the ball valve pneumatically and V, it is made up by two parts of GT pneumatic piston type executive body (single , a pair of function ) and V ball valve. Its sealed formalism is sealed softly and the metal seal two kinds hard . Pneumatic and V to regulate the ball valve for the right angle turning round type structure , as the core of the valve relatively has stronger shear function when the valve seat is rotated, especially suitable for the regulation with the fibre and tiny particle medium to control. The company is used in such trades as petroleum , chemical industry , electricity , papermaking , metallurgy ,etc. extensively.

Second,characteristic: Because V ball valve simple to flow way, is it hinder relatively light to flow, circulate ability to be relatively heavy.
Two kinds of U gap forms that the one that have characteristic of flow of percentage such as being approximate on the valve core of V ball is V of having the approximate linear flow characteristic, needn't adjust through the positioner, can realize the flow of different flow characteristic is controlled !
Adjustable to can be up to 300: 1, is far greater than direct forms , two-seater regulating valves.
Having higher sealed grades, the grade of letting out of the soft sealed structure is as GB/T4213VI grade. The grade of letting out of the sealed structure of great proficiency is as GB/T4213IV grade.
, it is being comparatively convenient that the reaction way is being varied, only need to rotate 90 degrees Centigrade in the initial position of core of the valve, can realize the conversion of the function way .
Of simple structure and safeguarding it conveniently. The volume is smaller , easier to install.
Third ,structure principle:

1.1 structure:

Regulate the ball valve and is made up of two parts of pneumatic piston type executive body and V ball valve pneumatically and V, the pneumatic piston type executive body divides into single function and a pair of function and two kinds again. The sealed form of the V ball valve, in order to seals softly and seals two kinds hard .

1.2 movement principles:

a.On the pneumatic piston type executive body is a pair of function :
Input piston Left deviation , the second on the right angry room of executive body separately by the source of the gas signal pressure that a pair of function positioner outputs, because it is different to input Left deviation of the piston , source of the gas pressure of second on the right angry room , form the difference of pressing, promote the piston to do rectilinear motion. Through the gear wheel , rack transmission , change the rectilinear motion of the piston into rotation sports of the main shaft of executive body, until the pressure balancing of angry room of Left deviation , right, sports stop. The drive valve stem, valve core do rotatory sports while doing rotatory sports in the executive body, the company achieves the goal of regulating in order to change the area of circulation among the valve core , valve seat.
b.On the pneumatic piston type executive body is the single function :
The air signal pressure outputted from the single function positioner is input there is no spring to the executive body in air room of one side, the angry signal pressure acts on the function of difference among thrust formed on the piston and spring strength , the air cylinder piston does rectilinear motion, pass the gear wheel , rack transmission. Thrust until the angry signal pressure forms and spring strength are balanced, sports stop. The drive valve stem, valve core do rotatory sports while the main shaft of executive body does rotatory sports, thus the company changes the area of circulation between the core of the valve , valve seat, achieve the goal of regulating .

Fourth , technical parameter and performance :

3.1 valves of body:

Form : Cast the valve body directly
Nominal and open directly: 25~300mm
Nominal pressure: PN1.6 , 4.0 , 6.4MPa
Connect the form : To the inserting type ( Pipeline flange) : JB79-59
Flange type: JB79-59
Material : ZG25I , ZG1Cr18Ni9Ti,
ZG0Cr18Ni12MoTi
Temperature range: Normal atmospheric temperature: -20 degrees Centigrade- +180 degrees Centigrade of middle temperature: +40 degrees Centigrade- +350 degrees Centigrade
Packing : Model V polytetrafluoroethylene (PTFE), soft graphite.

Package in 3.2 valves:

Core pattern of the valve: Valve core of Model V
Flow characteristic: Wait for the percentage characteristic
Material : ICr18Ni9Ti, oCr18Ni12Mo2Ti
Valve seat material : Four Fluorine ethylene, purpose-built PPL, metal valve seat.
Adjustable than: 350: 1

Fifth, executive body:

Pattern of the air cylinder : Single cylinder type or the double-cylinder type
Working pressure of the air cylinder : 0.4~0.7MPa
The switch time of air cylinder : Pair of function type 1 seconds
The dawdling amount of air of the air cylinder : 1~131h
Electromagnetic valve power : 220VAC, 24VDC
Journey : 00°
Environment temperature: -20 degrees Centigrade- 90 degrees Centigrade (special requirement: -40~150)
Performance : (take the positioner)
Basic error: 2%
Lack of: 2%
Dying area: 0.6%
Letting out amount: Seal softly: GB/T4213 VI grade
Seal hard : GB/T4213 IV grade

Sixth, flow coefficient Kv:

Seventh, pneumatic V type regulates the external dimension of the ball valve:

Eighth, install and use the precautions:

A.Installation is pneumatic and V while regulating the ball valve, should make the flow direction of the medium make the direction in order to flow .
B.Pneumatic to regulate coherent pipeline by ball there should be by the valve while being V, in order to overhaul and change the valve in case of not influencing production .
C.To opening angrily, angry to imprison way when adjusting , is it pull down executive body to need only , rotate 90° valve core with valve stem position, load executive body onto again, can realize the conversion of the function way .

Ninth, explanation of compilation of type:

Order notice:
First, pneumatic V type regulates the name of product and type of ball valve Pneumatic V type regulates the ball valve requirements Pneumatic V type regulate ball valve lead the enclosure so that for your correct selecting type we. Second, if the pneumatic V type already selected the company by the designing unit regulates the ball valve type , please regulate the ball valve type and place an order with sales department of our department directly according to pneumatic V type.
Third, as the occasion that is used is very important or when the environment is more complicated, please try one's best to offer the design drawing and detailed parameter , is verified and checked on you by our expert.
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