HTSW bellows sealed single seat control valve is a top-oriented structure of the control valve, the valve body is compact, the fluid channel was S streamlined, the pressure drop loss is small, large flow, adjustable range. The upper bonnet has a bellows seal structure that completely eliminates the possibility that the process media leaks out of the stem movement gap, which is one of the salient features of the bellows seal valve. Due to the deformability of the bellows element itself and the outstanding anti-aging properties, this control valve completely overcomes the weaknesses of filler aging and temperature sensitivity, which are usually present in the packing seal valve. Secondly, the use of bellows - filler double seal structure, safety and reliability is better, therefore, it is highly toxic, strong corrosive, radioactive and other rare special medium automatic control system is widely used. Spool-oriented area, good anti-vibration, with a multi-spring film actuator, its compact structure, the output force.

Main technical parameters and performance
Body
Type through single seat cast ball valve
Nominal diameter 40 ~ 200mm
Nominal pressure ANSI 150,300,600
JIS 10,20,30,40 K PN 1.6, 4.0, 6.4 MPa
Permissible pressure of 1MPa, 2 MPa, 3.5 MPa
Connection type Flange type: RF and RJ
Standard according to JIS B2201 ANSI B16.5 JB / T79.1
PN 1.6MPa RF JB / T79.2 Concave surface
Welding type: Welded welding SW (40 ~ 50mm) Butt welding BW (65 ~ 200mm)
Material HT200 ZG25 ZG1Cr18Ni9
      ZG0Cr17Ni12Mo2 1.25Cr0.5Mo
      5.0Cr0.5Mo or SCPH21 SCPH61 Ti
Upper valve cover at room temperature (P): - 17 ~ + 230 ℃
Elongation type I (E1): + 230 ~ + 350 ℃, -45 ~ -17 ℃
Note: The operating temperature is not allowed to exceed the allowable range of various materials
Gland type bolts
Filler V-type PTFE packing, impregnated PTFE impregnated asbestos packing, asbestos woven packing.
Valve components
Spool type on the single-seat plunger-type spool
Flow characteristics High capacity flow characteristics (see Figure 2) Equal percentage characteristics (%) and linear characteristics (L) High accuracy flow characteristics (refer to Figure 1)
                                      Equal percentage characteristics (%) and linear characteristics (L) Styroft welding quick release spool (QS)
Material 0Cr17Ni12Mo2 and surfacing Division too Lai alloy
Bellows material 1Cr18Ni9

Implementing agency
Type HA multi-spring film actuator
Diethylene-vinyl rubber clip nylon
Spring range 0.02 ~ 0.10 0.08 ~ 0.24MPa
Supply pressure 0.14 0.16 0.28 0.40MPa
Air supply connector Rc 1/4
Ambient temperature -30 ~ +70 ℃
Note: The valve can also be equipped with VA5 or VA6 actuator.

Valve action type gas - open or gas - off type
Accessories locator, hand wheel institutions, pneumatic valve position transmitter.
Performance
Leakage
Metal seat: meet the standard ANSI B16.104 Ⅳ level, less than the rated Cv 0.01%
Polytetrafluoroethylene Seat: Meet the standard ANSI B 16.104 Ⅵ, less than the rated Cv10-7
Styrian Stacking Metal Seat: Less than rated Cv 10-7
Hysteresis 5% (without locator) 3% (with locator)
Linear ± 11% (without locator) ± 3% (with locator)
Note: The use of standard V-type PTFE packing. Adjustable range of 50: 1

Ordering instructions
Product model and name
2. Nominal diameter DN (mm
Nominal pressure
4. Flow characteristics requirements
5. Body material and trim
6. Media type and temperature range
7. Before and after the valve pressure (pressure)
8. Sealed form
9. Supporting accessories