HCBW Pneumatic Cage-Type Double-Seat Bellows Sealed Control Valve
HCBW bellows sealed cage-type double-seat control valve is a pressure-balanced control valve. It features a compact valve body structure with an S-shaped fluid channel, which results in small pressure drop loss, large flow rate, and a wide adjustable range. The upper valve bonnet adopts a bellows sealing structure, which can completely eliminate the possibility of process medium leaking out from the valve stem movement gap—this is one of the significant characteristics of bellows sealed valves. Due to the deformability and excellent anti-aging property of the bellows element itself, this type of control valve completely overcomes the common weaknesses of packing-sealed valves, such as packing aging and temperature difference sensitivity. Secondly, the adoption of a bellows-packing double sealing structure ensures better safety and reliability. Therefore, it is widely used in automatic control systems for rare and special media such as highly toxic, strongly corrosive, and radioactive substances.
The control valve is equipped with a multi-spring diaphragm actuator, which has a compact structure and large output force.
| Cv value and stroke are shown in Table 1. Table 1 |
|
Nominal diameter
(mm) |
40 |
50 |
65 |
80 |
100 |
150 |
200 |
|
Valve seat diameter
(mm) |
25 |
32 |
40 |
32 |
40 |
50 |
40 |
50 |
65 |
50 |
65 |
80 |
65 |
80 |
100 |
100 |
125 |
150 |
125 |
150 |
200 |
|
Rated Cv value
|
High-precision, ordinary sleeve
|
11 |
17 |
24 |
17 |
24 |
44 |
24 |
44 |
68 |
44 |
68 |
99 |
68 |
99 |
175 |
175 |
275 |
360 |
275 |
360 |
650 |
|
High-capacity sleeve
|
Equal percentage
|
|
|
36 |
|
|
60 |
|
|
100 |
|
|
140 |
|
|
220 |
|
|
420 |
|
|
820 |
|
Linear
|
|
|
40 |
|
|
75 |
|
|
110 |
|
|
150 |
|
|
240 |
|
|
435 |
|
|
850 |
|
Rated stroke
(mm) |
25 |
38 |
50 |
75 |
| Remark: The flow characteristics of high-precision metal valve seats comply with IEC534-2. |
Allowable pressure difference: See Tables 2-5
Ⅰ. Metal Valve Seat
A. Air-closed Valve Table 2 |
|
Actuator
|
Supply pressure
|
Spring range
|
Positioner
|
Allowable pressure difference
(MPa) |
|
Nominal diameter
(mm) |
| 40 |
50 |
65 |
80 |
100 |
150 |
200 |
| HA2D |
0.14 |
0.02-0.10 |
With or without
|
0.5 |
0.38 |
0.33 |
0.27 |
0.21 |
|
|
| 0.16 |
0.02-0.10 |
With |
2.0
24.6 |
1.9 |
1.65 |
1.37 |
2.04 |
|
|
| 0.4 |
0.08-0.24 |
With |
2.0
5.0 |
2.0
5.0 |
2.0
4.9 |
2.0
4.1 |
2.0
3.14 |
|
|
| HA3D |
0.14 |
0.02-0.10 |
With or without |
0.85 |
0.7 |
0.6 |
0.5 |
0.37 |
0.26 |
|
| 0.16 |
0.02-0.10 |
With |
2.0
4.35 |
2.0
3.35 |
2.0
2.9 |
2.0
2.43 |
1.85 |
1.3 |
|
| 0.4 |
0.08-0.24 |
With |
2.0
5.0 |
2.0
5.0 |
2.0
5.0 |
2.0
5.0 |
2.0
5.0 |
2.0
3.93 |
|
| HA4D |
0.14 |
0.02-0.10 |
With or without |
|
|
1.01 |
0.83 |
0.64 |
0.45 |
0.37 |
| 0.16 |
0.02-0.10 |
With |
|
|
2.0
.0 |
2.0
4.2 |
2.0
3.1 |
2.0
2.25 |
1.85 |
| 0.4 |
0.08-0.24 |
With |
|
|
2.0
5.0 |
2.0
5.0 |
2.0
5.0 |
2.0
5.0 |
2.0
5.0 |
| B. Air-to-open valve Table 3 |
|
Actuator
|
Supply pressure
(MPa) |
Spring range
(MPa) |
Positioner
|
Allowable pressure difference (MPa)
|
|
Nominal diameter (mm)
|
| 40 |
50 |
65 |
80 |
100 |
150 |
200 |
| HA2R |
0.14 |
0.02-0.1 |
With or without
|
0.5 |
0.38 |
0.33 |
0.27 |
0.21 |
|
|
| 0.28 |
0.08-0.24 |
With |
2
3.4 |
2
2.7 |
2
2.3 |
1.92 |
1.45 |
|
|
| HA3R |
0.14 |
0.02-0.1 |
With or without |
0.9 |
0.7 |
0.6 |
0.5 |
0.37 |
0.26 |
|
| 0.28 |
0.08-0.24 |
With |
2
5 |
2
4.8 |
2
4.1 |
2
3.4 |
2
2.6 |
1.83 |
|
| HA4R |
0.14 |
0.02-0.1 |
With or without |
|
|
1.01 |
0.83 |
0.64 |
0.45 |
0.37 |
| 0.28 |
0.08-0.24 |
With |
|
|
2
5 |
2
5 |
2
4.5 |
2
3.15 |
2
2.55 |
Ⅱ. Soft Valve Seat
A. Air-closed Valve Table 4 |
| Actuator |
Supply pressure
(MPa) |
Spring range
(MPa) |
Positioner |
Allowable pressure difference (MPa) |
| Nominal diameter (mm) |
| 40 |
50 |
65 |
80 |
100 |
150 |
200 |
| HA2D |
0.14 |
0.02-0.10 |
With or without |
0.35 |
0.27 |
0.23 |
0.19 |
0.14 |
|
|
| 0.16 |
0.02-0.10 |
With |
1.5 |
1.33 |
1.15 |
0.96 |
0.73 |
|
|
| 0.4 |
0.08-0.24 |
With |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
|
|
| HA3D |
0.14 |
0.02-0.10 |
With or without |
0.61 |
0.48 |
0.41 |
0.34 |
0.26 |
0.18 |
|
| 0.16 |
0.02-0.10 |
With |
1.5 |
1.5 |
1.5 |
1.5 |
1.3 |
0.9 |
|
| 0.4 |
0.08-0.24 |
With |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
|
| HA4D |
0.14 |
0.02-0.10 |
With or without |
|
|
0.7 |
0.6 |
0.45 |
0.31 |
0.26 |
| 0.16 |
0.02-0.10 |
With |
|
|
1.5 |
1.5 |
1.5 |
1.5 |
1.3 |
| 0.4 |
0.08-0.24 |
With |
|
|
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
| B. Air-to-open Valve Table 5 |
| Actuator |
Supply pressure
(MPa) |
Spring range
(MPa) |
Positioner |
Allowable pressure difference (MPa) |
| Nominal diameter (mm) |
| 40 |
50 |
65 |
80 |
100 |
150 |
200 |
| HA2R |
0.14 |
0.02-0.10 |
With or without |
0.35 |
0.27 |
0.23 |
0.19 |
0.14 |
|
|
| 0.28 |
0.08-0.24 |
With |
1.5 |
1.5 |
1.5 |
1.34 |
1 |
|
|
| HA3R |
0.14 |
0.02-0.10 |
With or without |
0.51 |
0.48 |
0.41 |
0.68 |
0.52 |
0.36 |
|
| 0.28 |
0.08-0.24 |
With |
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
1.3 |
|
| HA4R |
0.14 |
0.02-0.10 |
With or without |
|
|
0.7 |
0.6 |
0.45 |
0.31 |
0.26 |
| 0.28 |
0.08-0.24 |
With |
|
|
1.5 |
1.5 |
1.5 |
1.5 |
1.5 |
Flange distance: See Table 6
Table 6 Unit: mm |
| Nominal diameter |
A |
ANSI150
JIS10K
PN1.6MPa
RF |
ANSI300
JIS2030K
RF
PN4.0MPa |
JIS20K
LG |
JIS30K
LG |
ANSI
150
RJ |
ANSI
300
RJ |
ANSI
300
LG |
ANSI
150
SW,BW |
ANSI
300
SW,BW |
| 40 |
222 |
235 |
236 |
248 |
235 |
248 |
244 |
251 |
251 |
| 50 |
254 |
267 |
267 |
276 |
267 |
283 |
276 |
286 |
286 |
| 65 |
276 |
292 |
292 |
303 |
289 |
308 |
302 |
311 |
311 |
| 80 |
298 |
317 |
317 |
326 |
311 |
333 |
327 |
337 |
337 |
| 100 |
352 |
368 |
368 |
379 |
365 |
384 |
378 |
394 |
394 |
| 150 |
451 |
473 |
473 |
486 |
464 |
489 |
483 |
473 |
508 |
| 200 |
543 |
568 |
568 |
580 |
556 |
584 |
578 |
568 |
610 |
