Gate valve is one of the most widely used valves in various fluid transportation projects. Traditional gate valves generally have phenomena such as easy fluid leakage and serious corrosion of internal parts. In the ordinary soft seal gate valves on the market, the stem shaft seal is easy to leak, and it is impossible to replace the sealing ring under continuous water and at any opening degree.
Product Description
Gate valve is one of the most widely used valves in various fluid transportation projects. Traditional gate valves generally have phenomena such as easy fluid leakage and serious corrosion of internal parts. In the ordinary soft seal gate valves on the market, the stem shaft seal is easy to leak, and it is impossible to replace the sealing ring under continuous water and at any opening degree.
The elastic seat seal gate valve adopts novel structural design, strict manufacturing technology and high-performance new materials, which overcomes the defects of the traditional gate valve, such as poor sealing, internal parts, especially the gate plate, easy to rust, rubber elastic fatigue and aging, reliable sealing performance, Light and quick operation, simple and convenient maintenance and long service life. Suitable for domestic water systems, water supply and drainage systems, sewage treatment systems, chemical fluid delivery systems, etc., used as a cut-off device on fluid lines in the construction, urban environmental protection, petrochemical, pharmaceutical, food, metallurgy, textile, power and other industries (not Suitable for throttling).
Features
The elastic seat seal gate valve, the main seal is a monolithic gate plate completely covered with rubber, which produces a small amount of adaptive elastic deformation under the action of operating force and water pressure, forming an excellent sealing effect with the precision cast valve seat.
◆ Nodular cast iron shell
The valve body and bonnet are made of ductile iron with high strength and corrosion resistance. The valve seat and valve body are integrally formed by precision casting without any processing.
◆ Full diameter flat bottom runner
When the valve is fully open, the gate completely leaves the flow path, and there is no groove at the bottom of the valve seat, which is not easy to accumulate debris. It is equivalent to a straight pipe and has the lowest flow resistance.
◆ All rubber covered gates
High-performance rubber wraps the skeleton completely, and cast iron is completely isolated from the medium without corrosion. The rubber is softly sealed and firmly knotted with the skeleton, and the whole is formed by hot vulcanization.
◆ Integral copper nut
The gate nut is integrally connected with the skeleton, and there is no movement empty stroke and loose phenomenon. Bronze material, self-lubricating with the valve stem, effectively reduce the operating torque.
◆ Guide rail system
There is a rail system between the valve body and the gate. The bearing water pressure is not offset when the gate is sealed, and the rubber is not contacted and worn when lifting to prevent the valve stem from bending.
◆ Stainless steel stem
Corrosion-resistant stainless steel stem, trapezoidal thread rolling processing, smooth thread wear resistance, effectively reduce operating torque and increase service life.
◆ Double thrust bearing (dark rod type DN≤300)
The stem has double thrust bearings at the neck, and the inverted stem avoids water pressure. Bronze material, self-lubricating with the valve stem, effectively reduce the operating torque.
◆ Valve stem axial seal (dark rod type)
Three O-ring seals, axial self-sealing under the effect of water pressure, without the trouble of packing seal adjustment. The top dust ring prevents external impurities from entering the shaft seal.
◆ Inverted seal structure (dark rod type DN≤300)
The patented inverted seal structure allows the valve to replace the O-ring seal at the gland in emergency situations where water is constantly flowing and at any angular opening.
◆ Medium flange connection
High-strength internal cavity angle screws, hot melt adhesive and valve cover rubber ring are closed, completely isolating the screws from the working medium and the external environment.
◆ Double feet and double rings
For gate valves of all specifications, the valve body is integrally cast with two legs, and the valve cover is integrally cast with two lifting rings, which is convenient for handling and storage.
◆ Non-toxic anti-corrosion coating
The inner and outer surfaces of the valve are electrostatically coated with non-toxic epoxy resin powder, which is corrosion-resistant and long-life, and can be directly used in drinking water, food and pharmaceutical industries.
◆ Diversified operation
The structure has dark rod type and bright rod type. It can be operated by handwheel, T-handle, electric, pneumatic and other devices. The valve position on-site indication, valve position signal output, code lock control, extended operating rod, direct buried device are available.
◆ Convenient installation and construction
With flange, clamp groove, socket, socket, mechanical joint, PE joint and other connection methods, optional telescopic function, convenient connection with cast iron, steel, plastic and other pipelines.
Executive Standard
1. Valve design and manufacturing according to GB / 24924-2010 standards;
2. The length of the valve structure according to the provisions of GB / T12221-2005;
3. Inspection and testing should be consistent with the relevant provisions of GB / T13927-2008;
4. Flange size according to the provisions of GB / T17241.6-2008;
Technical Parameters
|
Nominal size |
DN40~DN800 |
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|
Suitable media |
Clear water, or similar physical and chemical properties of water medium
(Sewage, raw water, hot water, oil medium, please specify)
|
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|
Operating temperature℃ |
0-70 (standard configuration) 0-100 (hot water configuration) |
||
|
Nominal pressure |
PN10 |
PN16 |
PN25 |
|
Work pressure（MPa) |
≤1.00 |
≤1.60 |
≤2.50 |
|
Strength test（MPa) |
1.50 |
2.40 |
3.75 |
|
Seal test（MPa) |
1.10 |
1.76 |
2.75 |
|
Low pressure test（MPa) |
0.02 |
0.02 |
0.02 |
|
Serial number |
name |
material |
|
1 |
Body |
QT450 |
|
2 |
Valve plate |
QT450+NBR |
|
3 |
Stem nut |
QT450 |
|
4 |
Valve stem |
20Cr13 |
|
5 |
Flange seals |
NBR |
|
6 |
cap |
QT450 |
|
7 |
O-ring |
NBR |
|
8 |
O-ring |
NBR |
|
9 |
Countersunk head bolt |
35# |
|
10 |
Dust cover |
NBR |
|
11 |
Round head screw |
35# |
|
12 |
Handwheel |
QT450 |
|
13 |
Gland |
QT450 |
|
14 |
Countersunk head bolt |
35# |
The main shape and connection dimensions
|
Nominal diameter |
The main dimensions and connection dimensions |
|||||||
|
L |
D |
D1 |
D2 |
C |
F |
Z-d |
H |
|
|
Z45X-10Q |
||||||||
|
40 |
165 |
150 |
110 |
84 |
19 |
3 |
4-Φ19 |
240 |
|
50 |
178 |
165 |
125 |
99 |
19 |
3 |
4-Φ19 |
240 |
|
65 |
190 |
185 |
145 |
118 |
19 |
3 |
4-Φ19 |
260 |
|
80 |
203 |
200 |
160 |
132 |
19 |
3 |
8-Φ19 |
275 |
|
100 |
229 |
220 |
180 |
156 |
19 |
3 |
8-Φ19 |
380 |
|
125 |
254 |
250 |
210 |
184 |
19 |
3 |
8-Φ19 |
410 |
|
150 |
267 |
285 |
240 |
221 |
19 |
3 |
8-Φ23 |
435 |
|
200 |
292 |
340 |
295 |
266 |
20 |
3 |
8-Φ23 |
630 |
|
250 |
330 |
395 |
350 |
319 |
22 |
3 |
12-Φ23 |
645 |
|
300 |
356 |
445 |
400 |
370 |
24.5 |
4 |
12-Φ23 |
697 |
|
350 |
381 |
505 |
460 |
429 |
24.5 |
4 |
16-Φ23 |
802 |
|
400 |
406 |
565 |
515 |
480 |
24.5 |
4 |
16-Φ28 |
842 |
|
450 |
432 |
615 |
565 |
530 |
25.5 |
4 |
20-Φ28 |
1060 |
|
500 |
457 |
670 |
620 |
582 |
26.5 |
4 |
20-Φ28 |
1170 |
|
600 |
508 |
780 |
725 |
682 |
30 |
5 |
20-Φ31 |
1300 |
|
700 |
610 |
895 |
840 |
794 |
32.5 |
5 |
24-Φ31 |
1550 |
|
800 |
660 |
1015 |
950 |
901 |
35 |
5 |
24-Φ34 |
1750 |
|
900 |
711 |
1115 |
1050 |
1001 |
37.5 |
5 |
28-Φ34 |
1950 |
|
1000 |
811 |
1230 |
1160 |
1112 |
40 |
5 |
28-Φ37 |
2170 |
|
Z45X-16Q |
||||||||
|
40 |
165 |
150 |
110 |
84 |
19 |
3 |
4-Φ19 |
240 |
|
50 |
178 |
165 |
125 |
99 |
19 |
3 |
4-Φ19 |
240 |
|
65 |
190 |
185 |
145 |
118 |
19 |
3 |
4-Φ19 |
260 |
|
80 |
203 |
200 |
160 |
132 |
19 |
3 |
8-Φ19 |
275 |
|
100 |
229 |
220 |
180 |
156 |
19 |
3 |
8-Φ19 |
380 |
|
125 |
254 |
250 |
210 |
184 |
19 |
3 |
8-Φ19 |
410 |
|
150 |
267 |
285 |
240 |
221 |
19 |
3 |
8-Φ23 |
435 |
|
200 |
292 |
340 |
295 |
266 |
20 |
3 |
12-Φ23 |
630 |
|
250 |
330 |
405 |
355 |
319 |
22 |
3 |
12-Φ28 |
645 |
|
300 |
356 |
460 |
410 |
370 |
24.5 |
4 |
12-Φ28 |
697 |
|
350 |
381 |
520 |
470 |
429 |
26.5 |
4 |
16-Φ28 |
802 |
|
400 |
406 |
580 |
525 |
480 |
28 |
4 |
16-Φ31 |
842 |
|
450 |
432 |
640 |
585 |
548 |
30 |
4 |
20-Φ31 |
1060 |
|
500 |
457 |
715 |
650 |
609 |
31.5 |
4 |
20-Φ34 |
1170 |
|
600 |
508 |
840 |
770 |
720 |
36 |
5 |
20-Φ37 |
1300 |
|
700 |
610 |
910 |
840 |
794 |
39.5 |
5 |
24-Φ37 |
1550 |
|
800 |
660 |
1025 |
950 |
901 |
43 |
5 |
24-Φ40 |
1750 |
|
900 |
711 |
1125 |
1050 |
1001 |
46.5 |
5 |
28-Φ40 |
1950 |
|
1000 |
811 |
1255 |
1170 |
1112 |
50 |
5 |
28-Φ43 |
2170 |
Structure picture
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