The ductile iron rising stem gate valve features a lifting stem design, where the valve stem and gate are connected via threads. Rotation of the handwheel causes the valve stem to move up and down in sync with the gate, with the length of the stem’s exposed section varying according to the valve’s opening degree.
This valve has a bidirectional sealing structure, which can be installed horizontally or vertically, and the flow direction of the medium is not restricted; When installed vertically, it is recommended to have the handwheel facing upwards for easy operation.
Advantages
1. The opening and closing status is intuitive and controllable, with high inspection efficiency
The valve stem is exposed and rises and falls synchronously with the gate. The operator can directly determine the valve opening degree by the length of the exposed valve stem (the valve stem extends the longest when fully open and the shortest when fully closed), without the need for additional opening indicators or instrument detection. This visualization feature greatly improves the efficiency of on-site inspections, especially suitable for working conditions that require frequent debugging and emergency operations. It can effectively avoid insufficient flow or abnormal system pressure caused by misjudging the opening degree.
2. Convenient maintenance and reduced maintenance costs
The key components such as the valve stem and packing box are exposed, and during daily maintenance, there is no need to disassemble the valve body to directly inspect the wear and corrosion of the valve stem, as well as the sealing performance of the packing. If there is medium leakage, simply tighten the packing gland bolts or replace the packing; When the valve stem becomes stuck, it can be directly lubricated, calibrated, or replaced. Compared to the disassembly repair of the valve body of the concealed stem gate valve, the process is simpler, the downtime is shorter, and the maintenance cost is lower.
Packing
Standard export wooden case packaging
Application Scenarios
The rising stem gate valve are used in HVAC cold/hot water circulation exposed pipes and fire water system exposed main pipelines in industrial plants and commercial buildings.
Material Specifications
Part Name
Material
Valve body, bonnet
Cast iron, ductile iron, cast steel
Valve stem
Stainless steel
Stem nut
Brass alloy
Seal ring
NBR, EPDM
Hand wheel
Malleable iron
Dimensions
DN (mm)
L
H
D
D1
D2
n- ϕ d
b
f
1.0
1.6
1.0
1.6
1.0
1.6
1.0
1.6
1.0
1.6
40
165
300
150
150
110
110
84
84
4- ϕ 18
4- ϕ 18
19
19
3
50
178
340
165
165
125
125
99
99
4- ϕ 18
4- ϕ 18
20
19
3
65
190
370
185
185
145
145
118
118
4- ϕ 18
4- ϕ 18
20
19
3
80
203
410
200
200
160
160
132
132
8- ϕ 18
8- ϕ 18
22
19
3
100
229
450
220
220
180
180
156
156
8- ϕ 18
8- ϕ 18
24
19
3
125
254
480
250
250
210
210
184
184
8- ϕ 18
8- ϕ 18
26
19
3
150
267
550
285
285
240
240
211
211
8- ϕ 23
8- ϕ 23
26
19
3
200
229
630
340
340
295
295
266
266
8- ϕ 23
12- ϕ 23
26
20
3
250
330
750
395
405
350
355
319
319
12- ϕ 23
12- ϕ 28
28
22
3
300
356
820
445
460
400
410
370
370
12- ϕ 23
12- ϕ 28
28
24.5
4
350
381
980
505
520
460
470
429
429
16- ϕ 23
16- ϕ 28
30
26.5
4
400
406
1010
565
580
515
525
480
480
16- ϕ 28
16- ϕ 31
32
28
4
450
432
1270
615
640
565
585
530
548
20- ϕ 28
20- ϕ 31
32
30
4
500
457
1270
670
715
620
650
582
609
20- ϕ 28
20- ϕ 34
34
31.5
4
600
508
1390
780
840
725
770
682
720
20- ϕ 31
20- ϕ 37
36
36
5
Frequently Asked Questions (FAQ)
Q: What is the operating temperature range for this resilient seat gate valve?
The valve operates reliably within a working temperature range of -20°C < T < 120°C, making it suitable for various cold and hot water industrial pipelines.
Q: Can this valve be installed in any orientation?
Yes, it features a bidirectional sealing structure allowing horizontal or vertical installation. For vertical mounting, it is recommended to keep the handwheel facing upward for easier operation.
Q: What materials are available for the body and bonnet?
The valve body and bonnet can be manufactured from Cast Iron, Ductile Iron, or Cast Steel to suit different fluid media and pressure demands.
Q: How do I determine if the valve is open or closed?
The valve stem extends and retracts synchronously with the gate. You can visually verify its opening degree by observing the exposed stem length—longest when fully open, shortest when fully closed.
Q: What sealing options are offered for the seal ring?
The seal rings are available in high-performance NBR and EPDM materials, providing zero-leakage sealing across compatible system applications.