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ZY47F-16C self pressure differential control valve differential pressure control valve DN40506580100500

LF self balancing valve is a kind of valve which uses the pressure change of the medium to control itself and keeps the flow unchanged through the controlled system. It has flow indication and convenient adjustment. It is suitable for the flow control of non corrosive media such as heating and air conditioning. Before the operation, the system flow can be automatically kept constant at the required setting value.

price:USD$660.00
discount 70% in 2018-09-19 to 2018-09-21
price: USD$ 462.00
freight :USD$18.00,(Express)
freight :USD$7.00,(Postal parcel)
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ZYCZyC

A,ZYCZyCStructure characteristics:

ZYCThe main body of the self operated differential pressure control valve is composed of a double channel automatic regulating valve which can change the resistance of the circulation and a controller composed of two independent chambers separated by the diaphragm, and the side chamber is connected with the backwater pipe. When installed, it is installed on the return water pipeline. The channel automatic control valve is the actuator, and its action power comes from the water supply pressureP1Backwater pressureP2Variation of pressure difference between. The controller is a differential pressure comparator, the pressure difference is selected according to the resistance of the controlled heating system, and the spring reaction force in the backwater side is used to balance the pressure difference between the water supply and the water. When some users of the heating system adjust the room temperature, the resistance increases or decreases, which will cause the change of the circulating flow, until the pressure balance between the two sides of the diaphragm, so that the internal control system is automatically adjusted

Two,ZYCInstallation of self operated differential pressure control valve:

As far as possible, the selection of diameter should be considered when the flow rate is too low. The control valve is connected with the pressure pipe1/2Pipe thread,

The length of the guide pipe is1.5mConnect the water supply pipe. The valve is divided into constant pressure difference and adjustable pressure difference type of two. Nominal pressure:1.6MPAMedium temperature0-120℃

Three,ZYCZyCMain technical parameters

Model

Nominal pressure

Experimental pressure of shell

Pressure difference control range

Constant pressure differential type

Adjustable pressure difference type

ZYC-16OneH3T

1 6MPa

2.4MPa

10KPa20KPa30KPa

10.30KPa

4,ZYCSelf pressure differential control valve technical picture:

 

 ZyCWorking principle:

Now installed on the return pipeZYCThe example of self operated differential pressure control valve illustrates the working principle. When the pressure of water supplyp1When the signal is enlarged or reduced, the signal is transmitted by the connecting pipe, such as the upper cavity of the diaphragm, which drives the spool down, and reduces or increases the flow area of the valve seat.P2-P3Also increase or decrease untilP1-P2Keep a constant value. Backwater pressureP3The increase or decrease of the flow velocity at the outlet of the valve seat decreases or increases with the decrease of the diaphragm pressureP2Also increase or decrease in this moment, drive the spool up or down, know the diaphragm force re balance,P2Cost recovery,P1-P2The protection of the original value is constant, so as to ensure the system pressure difference between supply and return water basically unchanged.

 

Five,ZYCZyCDimensions of flange for main dimensionsGB4216Regulations:

DN
mm

Connection mode

L
mm

Hmm

flow
m3h

Applicable medium

Medium temperature

Major zero
Piece material

Constant pressure differential type

Adjustable pressure difference type

15

Thread

110

95

145

0 2-1

water

0100℃

Valve body, upper cover and lower cover
It is cast iron, the valve core is copper, the diaphragm is nylon reinforced rubber, and the spring is stainless steel

20

110

110

150

0.3-1.5

25

115

130

165

0 5-2

32

 

flange

130

140

190

1-4

40

200

190

340

15-6

50

215

205

355

2-8

65

230

240

390

3-12

80

275

300

500

5-20

100

290

350

550

10-30

125

310

380

580

15-45