Product introduction: Piston type steam pressure reducing valve is to control the opening of the opening and closing parts in the valve body to adjust the flow of the medium and reduce the pressure of the medium. At the same time, it can adjust the opening of the opening and closing parts with the help of the pressure behind the valve to keep the pressure behind the valve within a certain range. In the case of constant change of the inlet pressure, it can keep the outlet pressure within the set range and protect the subsequent life and production appliances.
Item NO.:
XUVAL77-48Lead Time:
45DaysProduct Orgin:
CHINABrand:
XUVALShipping Port:
ShanghaiPayment:
100%TTColor:
SilveryMOQ:
10Piston type steam pressure reducing valve
It consists of main valve and pilot valve. The main valve is mainly composed of valve seat, main valve disc, piston, spring and other parts. Pilot valve is mainly composed of valve seat, disc, diaphragm, spring, adjusting spring and other parts. The outlet pressure is set by adjusting the spring pressure, the diaphragm is used to sense the outlet pressure change, and the pilot valve is opened and closed to drive the piston to adjust the flow area of the throttle part of the main valve, so as to realize the function of pressure reduction and stabilization.
Model of steam pressure reducing valve: Y43H Y43wW
Nominal diameter of steam pressure reducing valve: 15mm-500mm
Service pressure of steam pressure reducing valve: 1.6mpa-16mpa
Connection mode of steam pressure reducing valve: flange connection
Steam pressure reducing valve type: spring type
Main function of steam pressure reducing valve: pressure reducing protection
Medium used for steam pressure reducing valve: steam pipe
Material of steam pressure reducing valve: cast steel, stainless steel, chrome molybdenum steel
Standard of steam pressure reducing valve: standard of mechanical department or customized non-standard
Main technical parameters and performance indexes of piston steam pressure reducing valve:
Nominal pressure (MPa)
1.6
2.5
4.0
6.4
10.0
16.0
Shell test pressure (MPa)*
2.4
3.75
6.0
9.6
15.0
24
Sealing test pressure (MPa)
1.6
2.5
4.0
6.4
10.0
16.0
Maximum inlet pressure (MPa)
1.6
2.5
4.0
6.4
10.0
16.0
Outlet pressure range (MPa)
0.1~1.0
0.1~1.6
0.1~2.5
0.5~3.5
0.5~3.5
0.5~4.5
Pressure characteristic deviation (MPa) △ P2P
GB12246-1989
Flow characteristic deviation (MPa)P2G
GB12246-1989
Minimum pressure difference (MPa)
0.15
0.15
0.2
0.4
0.8
1.0
Leakage volume
GB12245-1989
Material of main parts of piston type steam pressure reducing valve:
Part name
Material of parts
Body, cover and bottom cover
WCB
Seat disc
2Cr13
Cylinder liner
2Cr13/25 (hard chromium plating)
Piston
2cr13/copper alloy
Piston ring
Alloy cast iron
Guide valve seat and guide valve stem
2Cr13
Diaphragm
1Cr18Ni9Ti
Main valve spring
50CrVA
Main spring of pilot valve
50CrVA
Adjusting spring
60sI2Mn
Dimensions of piston type steam pressure reducing valve (PN1.6-4.0):
Dimensions
L
H
H1
1.6/2.5MPa
4.0MPa
15
160
180
295
90
20
160
180
330
98
25
180
200
330
110
32
200
220
330
110
40
220
240
345
125
50
250
270
345
125
65
280
300
350
130
80
310
330
385
160
100
350
380
385
160
125
400
450
400
200
150
450
500
415
210
200
500
550
475
240
250
650
525
290
300
800
580
335
350
850
620
375
400
900
660
405
450
900
730
455
500
950
750
465
Dimensions of piston type steam pressure reducing valve (PN6.4-16.0):
Dimensions
L
H
H1
6.4MPa
10.0/16.0MPa
15
180
180
305
105
20
180
200
340
105
25
200
220
340
120
32
220
230
340
120
40
240
240
355
135
50
270
300
355
135
65
300
340
360
140
80
330
360
395
170
100
380
400
185
125
450
415
215
150
500
430
225
200
550
495
260
250
650
545
310
300
800
600
355
350
850
640
395
400
900
690
435
500
950
780
495
Installation and use:
1. The pressure reducing valve y43h-16 is equipped with 0.05 ~ 0.4MPa, Y43H-25, 1 ~ 1.6Mpa, Y43H-40, 1 ~ 1.6Mpa, 1.6 ~ 2.5MPa adjusting spring, Y43H-64 and 1 ~ 3Mpa adjusting spring. The valve is equipped with 0.1 ~ 1MPa adjusting spring when leaving the factory, and the rest is attached with the valve. The user can choose according to the outlet pressure value
2. Before installing the pressure reducing valve, the pipeline system must be washed and cleaned to prevent welding slag and oxide scale from flowing into the valve and affecting the normal operation of the valve
3. The pressure reducing valve should be installed in a place convenient for operation and maintenance, and it must be vertically installed on the horizontal pipeline (see the installation diagram). Attention should be paid to make the flow direction of medium in the pipeline consistent with the direction indicated by the arrow on the valve body, and do not reverse install,
4. When the pressure reducing valve is installed and used, the stop valve of the bypass pipeline should be opened to eliminate the mixture of condensate water and steam water in the pipeline, so as to prevent the pressure reducing valve from being damaged by water hammer when the pressure reducing valve is opened. When there is no abnormal phenomenon, slowly rotate the adjusting screw clockwise to adjust the outlet pressure to the required pressure (based on the gauge pressure behind the valve). After adjustment, back tighten the lock nut, Screw on protective cover
5. A filter should be installed before the pressure reducing valve to prevent impurities in the medium from entering the pressure reducing valve and affecting its performance
6. There should be a straight pipe before and after the pressure reducing valve. The length of the straight pipe in front of the valve is about 600mm, and the length of the straight pipe behind the valve is about 1000mm
The pressure relief valve on your steam line does not match the current line pressure. But in principle, it can still pass through steam. Because the pressure reducing valve is controlled by the outlet pressure, now the outlet pressure is not enough, the main valve is in the full open state.
However, if there are still some problems in the long run, the general pressure reducing valve requires that the pressure difference between the inlet and outlet must be ≥ 0.2MPa.
The pressure reducing valve usually has a variety of specifications such as DN50 ~ DN 100, the working pressure before and after the valve is < 1MPa and 0.1 ~ 0.5MPa respectively, and the pressure regulating range error is ± 5%~10%。
It should be noted that although the water flow through the pressure reducing valve has a great head loss, it is still energy-saving in general because it reduces the waste of water, makes the flow distribution of the system reasonable and improves the system layout and working conditions.
D valve installation composition: it is composed of main valve and pilot valve. The main valve is mainly composed of valve seat, main valve disc, piston, spring and other parts. Pilot valve is mainly composed of valve seat, disc, diaphragm, spring, adjusting spring and other parts. The outlet pressure is set by adjusting the spring pressure, the diaphragm is used to sense the outlet pressure change, and the pilot valve is opened and closed to drive the piston to adjust the flow area of the throttle part of the main valve, so as to realize the function of pressure reduction and stabilization.
Pressure regulating steps of pressure reducing valve:
1. Close the gate valve in front of the pressure reducing valve and open the gate valve behind the pressure reducing valve to create the downstream low pressure environment
2. Turn the adjusting screw counterclockwise to the top position (relative to the lowest outlet pressure), and then close the back gate valve of the pressure reducing valve
3. Slowly open the gate valve in front of the pressure reducing valve to full open;
4. Slowly turn the adjusting screw clockwise to adjust the outlet pressure to the required pressure (subject to the gauge pressure behind the valve); After adjustment, lock the lock nut and open the back gate valve of the pressure reducing valve
5. If the outlet pressure is higher than the set pressure, it must be readjusted from the first step, that is, it can only be adjusted from low pressure to high pressure.
Product structure chart:
Packing & Delivery :
Packing Details:all by seaworthy plywood case and packed strongly by packing belt as below
Delivery Details:Generally it is 5-10 days if the goods are in stock. or15-30 days if the goods are OEM or not
enough subject to the order quantity. But anyway, normally, we are able to make sure the delivery will not exceed 45days.
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