Self Actuated Control Valve
Self Actuated Control Valve has the advantages of using in no electricity and no gas source site. The pressure setting can be adjusted during operation. The quick opening flow characteristics is sensitive and of good sealing performance.
- Introduction
- Parameters
- Dimension
- Structure
- How to Order
Self Actuated Control Valve Â
BCST  self actuated control valve does not require any  external energy sources. It is adjusted by flow medium automatically. It  has the advantages of using in no electricity and no gas source site. The  pressure setting can be adjusted during operation. The quick opening flow  characteristics is sensitive and of good sealing performance. It is widely  used in petroleum, chemical, electric power, metallurgy, food, textile, machinery manufacturing and residential construction buildings and other industrial equipment for the medium of gas, liquid and steam. And they have the function of pressure reducing (for valve adjustment) or relief, regulating pressure (before adjustment for the valves) and automatically controlling.
Design Features
· Diaphragm type with sensitivity adjustment and fast response of the
pressure change
· Piston cylinder with high-pressure resistance and large adjustable travel
· Single-seat control valve, sleeve valve types for wide range control
· For controlling the downstream pressure
Technical ParameterÂ
| Body Type | Single seated, globe type |
| Size | DN15~DN250 (3/4″ to 10″) |
| Pressure Class | 1.6, 4.0, 6.4 Mpa; |
| ANSI 150, ANSI 300, ANSI 600 | |
| Characteristics | Quick open |
| Body Materials | WCB, CF8M, CF3M, CF3 |
| Trim materials | Stainless Steel |
| Temp range | – 5°C to ~ +70°C |
| Connection | Flanged, Socket welding, Butt welding |
| Gland packing | PTFE, Braided PTFE, Grafoil |
| Actuator | Pneumatic diaphragm actuator, Piston |
| Accuracy | Within ±5% |
 Actuator
Â
|  Active Area(cm)2 | 32※ | 80 | 250 | 630 |
| Setted pressure range (MPa) | 0.8～1.6
0.3～1.2 |
0.1～0.6
0.05～0.3 |
0.015～0.15
0.01～0.07 |
0.005～0.035 |
| Min pressure △Pmin(MPa) | ≥0.05 | ≥0.04 | ≥0.01 | ≥0.005 |
|  Max differential pressure (MPa) | 2 | 1.25 | 0.4 | 0.15 |
| Material | Diaphragm cover ：Galvanized steel ; Diaphram ：EPDM or FKM fiber | |||
|  Control pipeline,adaptor | Copper pipe or steel pipe 10×1; Ferrule type connector ：R1/4 “ | |||
Note ：※This pressure range is not for DN150 to DN250
â– Â Â Performance Â
|  Setted allowable error | ±8% | |||
| Â Allowable leakage
|
Metal seal | 4×0.01% rated capacity | ||
| Soft seal | DN15～50 | DN65～125 | DN150～250 | |
| 10气泡/min | 20气泡/min | 40气泡/min | ||
â– Â Â Allowable working temperature
| Diameter | 15～125mm | 150～250mm | |
|  Seal type | Metal seal | ≤150℃ | ≤140℃ |
|  Cooling tank ≤200℃ |  Cooling tank& length pipe ≤200℃ | ||
| Cooling tank & fin ≤350℃ |  Cooling tank& length pipe≤300℃ ※ | ||
| Soft Seal | ≤150℃ | ||
Note : ※ the allowable working temperature for valve , only when the medium is valve , if the working temperature reach 350 °C， please select PN 40 valve body .
â– Â Â Rated flow cofficient , noise  factor , allowable differential pressure Â
| Diameter  DN | 15 | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | |
|  Rated Flow Factor  KvS | 4 | 6.3 | 8 | 16 | 20 | 32 | 50 | 80 | 125 | 160 | 280 | 320 | 400 | |
| Noise factor Z Value | 0.6 | 0.6 | 0.6 | 0.55 | 0.55 | 0.5 | 0.5 | 0.45 | 0.4 | 0.35 | 0.3 | 0.2 | 0.2 | |
| Allowable Differential pressure
(Mpa) |
PN16 | 1.6 | 1.5 | 1.2 | 1.0 | |||||||||
| PN40 | 4.0 | |||||||||||||
Â
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DimensionÂ
| DN (mm) | 15 | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 |
| L (mm) | 130 | 150 | 160 | 180 | 200 | 230 | 290 | 310 | 350 | 400 | 480 | 600 | 730 |
| B (mm) | 212 | 212 | 238 | 238 | 240 | 240 | 275 | 275 | 380 | 380 | 326 | 354 | 404 |
| Weight (Kg) | 6.2 | 6.7 | 9.7 | 13 | 14 | 17 | 29 | 33 | 60 | 70 | 80 | 140 | 220 |
| B1 (mm) | – | – | – | – | – | – | – | – | – | – | 630 | 855 | 1205 |
| Weight  (Kg) | – | – | – | – | – | – | – | – | – | – | 140 | 210 | 300 |
Actuator  and weight Â
| Â Active Area(cm)2 | 32 | 80 | 250 | 630 |
| R (mm) | 172 | 172 | 263 | 380 |
| H (mm) | 435 | 430 | 470 | 520 |
| Weight  (Kg) | 7.5 | 7.5 | 13 | 28 |
StructureÂ
| 1 | Body | 2 | Seat | 3 | Shaft | 4 | Bonnet | 5 | Diaphragm cover | 6 | Diaphragm |
| 7 | Spring | 8 | Adjusting nut | 9 | Guided pipe | 10 | Bellow | 11 | Balance diaphragm | 12 | Â Charging valve |
How to orderÂ
1. Model and Name
2.DN(mm)Â Â Diameter
3.Working pressure
4.Flow Characteristic
5.Body material
6.Rate Flow rate Factor
7.Medium and working temperature
8.Inlet and outlet pressure (differential pressure )
9.Control signal
10.Other special requirement
Video for Self Actuated Control Valve
