1MPa 2MPa 3.5MPa Pneumatic Small Bore Single Seat Bellows Sealed Control Valve
HLSW Pneumatic Small-bore Single-seat Bellows Sealed Control Valve
HLSW bellows sealed small-bore single-seat control valve adopts a bellows sealing structure for the upper valve bonnet, 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 packed 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 media. 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 | |||||||||||||||||
|
Valve core type |
Valve seat and flow characteristic |
Stroke |
0.01 | 0.04 | 0.1 | 0.16 | 0.25 | 0.4 | 0.63 | 1 | 1.6 | 2.5 | 4 | 6.3 | 10 | 14 | |
|
Plunger valve core |
Metal valve seat |
Equal percentage (%) |
14.3 | ○ | △ | △ | △ | △ | △ | △ | △ | △ | △ | ||||
|
Linear (L) |
○ | ○ | ○ | ○ | ○ | △ | △ | △ | △ | △ | △ | △ | △ | △ | |||
|
Soft valve seat |
Equal percentage (%) |
○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ||||||
|
Linear (L) |
○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | |||||
|
Quick-opening valve core |
Stellite overlay welding valve seat (QS) |
6 | ○ | ○ | |||||||||||||
|
Nominal diameter (mm): 2025 |
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Allowable pressure difference: See Tables 2-4
| Ⅰ. Plunger valve core with metal seat (%, L) Table 2 | ||||||||||||||
|
Action mode |
Actuator |
Supply pressure (MPa) |
Spring range (MPa) |
Positioner |
Allowable pressure difference(MPa) |
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|
Rated Cv value |
||||||||||||||
| ≤0.25 | 0.4 | 0.63 | 1 | 1.6 | 2.5 | 4 | 6.3 | 10 | 14 | |||||
|
Air-closed type |
HA2D | 0.14 | 0.02-0.10 |
With or without |
2.0 5.0 |
2.0 3.1 |
2.0 3.1 |
1.63 | 1.63 | 1 | 1 | 0.54 | 0.41 | 0.25 |
| 0.16 | With | - | 2.0 5.0 |
2.0 5.0 |
2.0 5.0 |
2.0 5.0 |
2.0 5.0 |
2.0 5.0 |
2.0 2.7 |
2 | 1.2 | |||
| 0.4 | 0.08-0.24 | 2.0 5.0 |
2.0 5.0 |
2.0 3.7 |
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|
Air-opened type |
HA2R | 0.14 | 0.02-0.10 | With or without | 2.0 5.0 |
2.0 3.1 |
2.0 3.1 |
1.63 | 1.63 | 1 | 1 | 0.54 | 0.41 | 0.25 |
| 0.28 | 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 5.0 |
2.0 3.8 |
2.0 2.8 |
1.75 | |||
|
Remarks:
1.The maximum allowable pressure difference shall not exceed the maximum value specified in the ANSI B 16.34 or JIS B 2201 standard. 2.The upper number in the same cell is the allowable pressure difference when the valve is normally open, and the lower number indicates the allowable pressure difference when the valve is fully closed. |
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| Ⅱ. Soft Seat, Plunger Valve Core, Table 3 | ||||||||||||||
| Action mode | Actuator |
Supply pressure (MPa) |
Spring range (MPa) |
Positioner | Allowable pressure difference(MPa) | |||||||||
| Rated Cv value | ||||||||||||||
| ≤0.25 | 0.4 | 0.63 | 1 | 1.6 | 2.5 | 4 | 6.3 | 10 | 14 | |||||
| Air-closed type | HA2D | 0.14 | 0.02-0.10 | With or without | 1.5 | 1.5 | 1.5 | 1.15 | 1.15 | 0.7 | 0.7 | 0.38 | 0.28 | 0.17 |
| 0.16 | With | - | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 1.4 | 1.2 | |||
| 0.4 | 0.08-0.24 | - | - | - | - | - | - | - | 1.5 | 1.5 | 1.5 | |||
| Air-opened type | HA2R | 0.14 | 0.02-0.10 | With or without | 1.5 | 1.5 | 1.5 | 1.2 | 1.2 | 0.7 | 0.7 | 0.38 | 0.38 | 1.7 |
| 0.28 | 0.08-0.24 | With | 1.5 | |||||||||||
| Remark: The maximum allowable pressure difference shall not exceed the maximum value specified in the ANSI B16.34 or JIS B2201 standard. | ||||||||||||||
| Ⅲ. Stellite Overlay Welded Quick-Opening Valve Core (Metal Seat QS) Table 4 | |||||
|
Action mode |
Rated Cv value |
Supply pressure (MPa) |
Spring range (MPa) |
Allowable pressure difference (MPa) |
|
|
Rated Cv value |
|||||
| 10 | 14 | ||||
| Air-closed type | HA2D | 0.14 | 0.02～0.053 | 0.73 | 0.65 |
| 0.3 | 0.02～0.053 | 2 | 1.85 | ||
| Air-opened type | HA2R | 0.14 | 0.04(Start) | 0.33 | 0.3 |
| 0.28 | 0.08(Start) | 1.25 | 1.21 | ||
| Remark: The maximum allowable pressure difference shall not exceed the maximum value specified in the ANSI B16.34 and JIS B2201 standards. | |||||
| Flange distance: See Table 5 Table 5 Unit: mm |
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| Nominal diameter | A | ||||||
| ANSI150RF JIS10KRF PN1.6MPa |
ANSI300 JIS2030KRF PN4.0MPa |
ANSI150 RJ |
ANSI300 RJ |
JIS20K LG |
JIS30K LG |
ANSI300 LG |
|
| 20 | 184 | 194 | - | 206 | 198 | 208 | 203 |
| 25 | 184 | 194 | 197 | 210 | 190 | 212 | 206 |
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