HTSW bellows sealed single seat control valve is a top-guiding structure of the control valve, the valve body structure is compact, the fluid channel is S-streamlined, pressure drop loss is small, flow rate is large, adjustable range is wide. The upper valve cover adopts bellows sealing structure, which can completely eliminate the possibility of leakage of process medium from the movement clearance of the valve stem. This is one of the remarkable characteristics of bellows sealing valve. Due to the deformability of bellows and excellent anti-aging property, this kind of control valve completely overcomes the weaknesses of packing aging and temperature sensitivity which usually exist in packing sealing valves. Secondly, the double sealing structure of bellows and fillers is adopted, which has better safety and reliability. Therefore, it is widely used in the automatic control system of rare and special media, such as highly toxic, highly corrosive, radioactive and so on. The valve core has large guiding area and good vibration resistance. It is equipped with multi-spring film actuator, which has compact structure and large output force.

Main technical parameters and performance

Valve body

Type Direct-through single-seat cast ball valve

Nominal diameter 40-200 mm

Nominal Pressure ANSI 150, 300, 600

JIS 10, 20, 30, 40K PN 1.6, 4.0, 6.4MPa

Permissible Pressure 1 MPa, 2 MPa, 3.5 MPa

Connection Flanges: RF and RJ

According to JIS B2201 ANSI B16.5 JB/T79.1

PN 1.6MPa RF JB/T79.2 concave and convex surfaces

Welding Type: Embedded Welding SW (40-50mm) Butt Welding BW (65-200mm)

Material HT200 ZG25 ZG1Cr18Ni9

ZG0Cr17Ni12Mo2 1.25Cr0.5Mo

5.0Cr0.5Mo or SCPH21 SCPH61 Ti

Normal Temperature Type of Upper Cover (P): - 17 ~+230 Temperature

Elongation Type I (E1): +230-+350 C, -45--17 C

Note: Working temperature must not exceed the allowable range of various materials.

Cover type bolt compression type

Filler V-type PTFE filler, impregnated PTFE asbestos filler, asbestos braided filler.

In-valve assembly

Spool type up-steering single-seat plunger spool

Flow Characteristic High Capacity Flow Characteristic (Reference 2), Equal Percentage Characteristic (%) and Linear Characteristic (%) High Precision Flow Characteristic (Reference 1)

Equal Percentage Characteristic (%) and Linear Characteristic (%) Stalley Surfacing Quick Opening Valve Core (QS)

Material 0Cr17Ni12Mo2 and Surfacing Stellay Alloy

Bellows material 1Cr18Ni9

Executive Body

Type HA Multi-spring Membrane Actuator

Ethylene propylene rubber with nylon diaphragm

Spring range 0.02-0.100.08-0.24 MPa

Supply pressure 0.140.160.280.40MPa

Gas source joint Rc 1/4

Ambient temperature - 30 ~+70 C

Note: VA5 or VA6 actuators are also available for this valve.

Valve Action Type Air-Open or Air-Close Type

Accessory positioner, handwheel mechanism, pneumatic valve position conveyor, etc.

Performance

Leakage

Metal Seats: Standard ANSI B16.104 IV, less than 0.01% of rated Cv

PTFE Seat: Standard ANSI B 16.104VI, less than rated CV10-7

Stalley surfacing metal seat: 10-7 less than rated Cv

Backlash 5% (without locator) 3% (with locator)

Linear + 11% (without locator) + 3% (with locator)

Note: Standard V-type PTFE filler is used. Adjustable range 50:1