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Summary:
When there is no water in the pipe, the bronze valve clack drops down to the full opening position. Air is released from the discharge hole as water coming in, then water can be filled into the pipe immediately. When there isn’t any air in the pipe, water comes into the valve, then valve clack goes up to the shut-off position by lifting of the floating ball. These improve water transporting capacity and efficiency of the pipe system, reduce power consuming.
Air is dissolved into water, and then is released from water continuously when transporting. At this time, the floating-ball drops down, the air is released from the small hole on lever of the valve clack. Or the air gathered at the top of the pipe can lower the water transporting capacity of the pipe system.
When there is negative pressure in the pipe, bronze valve clack drops down, discharge hole is open, and then the valve draws in the air immediately, so avoide abnormal water supply caused by negative pressure in the pipe.
Unique Design:
Inside and outside epoxy resin powder coating, no iron exposed.
Valve pin and lever made of bronze, insure good durability.
Dust preventing cap fixed upon the guiding bushing, compact design, and attractive appearance.
Excellent corrosion protection:
Inside and outside epoxy resin powder coating.
Reliable health nature:
Epoxy resin powder is up to the health standard GB/T 17219-1998.
Scope of application:
Pipe for water transportation and pump’s existence, to be installed at the highest point of level pipe.
Design Standard: Manufacture’s standard Q/SDA 005-1
Flange: GB/T17241.6-1998 neq DIN2501
Face to face dimension: Depend on manufacturer
Testing standard: Company standard Q/SDA SY 005-1
Working temperature: NBR≤80℃
EPDM≤120℃
FBM≤160℃
Technical Characteristic:
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Nominal diameter
|
DN≤300
|
|
Nominal pressure
|
1.6MPa
|
1.0MPa
|
|
Strength testing
|
2.4MPa
|
1.5MPa
|
|
Sealing testing
|
1.76MPa
|
1.1MPa
|
Main components and materials:
|
No.
|
Name
|
Material
|
|
1
|
Body, cover
Lever locking
|
QT500-7 with internal and external epoxy resin coating
|
|
2
|
Seat
|
NBR EPDM or FPM
|
|
3
|
Disc, lever
|
ZCuAl10Fe3
|
Dimension (mm)
|
DN
|
L
|
H
|
Flange dimensions comply with GB/T17241.6-1998
|
|
O
|
C
|
g
|
b
|
f
|
n-d
|
|
1.0MPa
|
1.6MPa
|
1.0MPa
|
1.6MPa
|
1.0MPa
|
1.6MPa
|
|
50
|
320
|
470
|
165
|
125
|
99
|
19
|
3
|
4-19
|
|
65
|
320
|
470
|
185
|
145
|
118
|
19
|
3
|
4-19
|
|
80
|
350
|
500
|
200
|
160
|
132
|
19
|
3
|
8-19
|
|
100
|
440
|
520
|
220
|
180
|
156
|
19
|
3
|
8-19
|
|
125
|
490
|
560
|
250
|
210
|
184
|
19
|
3
|
8-19
|
|
150
|
540
|
610
|
285
|
240
|
211
|
19
|
3
|
8-23
|
|
200
|
700
|
720
|
340
|
295
|
266
|
20
|
3
|
8-23
|
12-23
|
|
250
|
870
|
960
|
395
|
405
|
350
|
355
|
319
|
22
|
3
|
12-23
|
12-28
|
|
300
|
1040
|
1100
|
445
|
460
|
400
|
410
|
370
|
24.5
|
4
|
12-23
|
12-28
|
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