Pneumatic V type ball valve is one kind of high-class control valve of quarter-turn structure, it mating with valve positioner can realize proportion regulation; mating with two bit five-way electromagnetic valve and control box can realize on-off control. V type ball valve spool is designed with especial form V type gap, has exact cut-off materiality and control function, apply to various control occasion, has many strong point such as large rated flow factor, large adjustable-ratio, superior seal performance, well-organized structure, small volume, can be erect or lie down installed etc. It applies to control gas, liquid, solid graininess medium. Due to between valve core and valve seat is closed rotation, has very large shear force so it has self-cleaning performance, especially apply to control the suspension liquid and solid graininess which include fiber or tiny solid grain. So that this product can wide use to automatic control system of many industrial department such as petroleum, chemical industry, papermaking, chemical fiber, electric power, metallurgy, pharmacy, environmental protection and so on.
Product outline
Feature
Pneumatic V type ball valve is composed of V type valve body and ZSQ type pneumatic actuator and other accessories, is one kind of high class control valve of quarter-turn structure. V type ball valve need not repair in long time, use life is long, it has provided for you one kind of valve of which is real high effectiveness to control technological state.
Have outstanding regulating characteristic: V type valve have one similar to equal percentage inherent discharge characteristic and up to 300:1 adjustable ratio. So that V type valve can provide precise control in wide variation scope.
Maximal flow volume: Due to its streamline form outline and full quarter-turn control reason, makes its volume maximum is special high, flow capacity is special large, flow resistance is small, so that can adopt smaller, more economic practical valve dimension.
V type valve adopt double-bearing structure, its mechanical stability is high, starting torque is small, ensure valve have very good sensibility and inductive speed.
Maximal reliability (safety): valve body is a whole structure, strong and durable, its operation no subject pipеline pressure influence and can avoid valve body leakage.
Superior leak tightness of metal Valve seat superior leak tightness: V type valve adopt movable metal valve seat, have automatic compensation function and superior seal performance and super long useful life. In flow direction, leakage rate �0-6 x rated flow factor.
Super strong shear capacity: V type valve adopt metal hard seal structure, V type valve core and metal valve seat during turn process, between V type gap and valve seat produce a very strong shear force which can cut-off fiber etc. impurity, and have self-cleaning function, avoid occurrence of valve check phenomenon.
Pneumatic V type ball valve structure well-organized, small and light, installation convenient, maintenance easy.
Pneumatic actuator adopt piston type cylinder and crank web switching structure, output torque is large, and volume is mall. Actuator adopt full seal water-proof design, protective level is high. Cylinder body adopt import mirror cylinder, non-lubricate, friction factor small, corrosion-resistant, have super-strong durability and reliability. All transmission bearing both adopts boundary self-lubricate bearing non-lubricate, ensure drive shaft un-attrition.
Main technic parameter
Pneumatic V type regulation ball valve is composed of pneumatic piston actuator and V type ball valve valve body.
1�/strong>V type regulation ball valve series parameter shown as table 1. Table 1. V type regulation ball valve serial parameter
Nominal diameter DN (mm)
25
32
40
50
65
80
100
125
150
200
250
300
350
400
450
500
600
Rated flow factor (CV)
27
47
70
110
170
280
410
750
980
1720
2900
3800
7000
9800
12000
15000
23000
Match use gas bulb tub
Ф6×1(G1/8)
Ф8×1.5 (G1/4)
Ф10×2(G3/8)
Max. corner
(αo)
90°
Working gas source pressure
(Mpa)
0.4~0.7
Input signal
4~20mA  220,  24VAC, V
Nominal pressure (MPa)
1.6, 2.5, 4.0, 6.4
Operation temperature scope
(â„?
-40~180, -40~250
Basic error
≤�.5%
Back lash
�.5%
Dead zone
�.6%
Gas consumption quantity
900L/h (standard state)
Leakage rate
�0-6 × rated flow factor
Note
DN25~DN250 oppose lined type, DN300~DN600 flange type
Note: 1. can custom-made small flow valve according to user provided flow scope.
2. can provide single action spring reset valve according to user demand.
2�/strong>Discharge characteristic: Inherent discharge characteristic of V type regulation ball valve is similar to equal percentage characteristic, characteristic curve shown as diagram 1.
3�span class="en_02">Main part material Valve core: 304, 316, and 316L (stainless steel)
Valve body: 304, 316, 316L or ZG25
Seal valve seat: (hard seal seat) 304, 316, and (soft seal seat) polytetrafluoroethylene fig.2V type ball valve structure diagram
