ZHLS-W bellows sealed small caliber single seat control valve is one of Cv3000 series products, which can be widely used to control different pressure and temperature of the fluid.
main features
Equipped with multi spring film actuators, compact structure and high output power.
The valve core adopts the upper guiding structure with large guiding area and good vibration resistance.
The upper cover adopts bellows and double packing seal structure, and is suitable for highly toxic, flammable, explosive and easy to swing.
Adjustment of special medium such as hair
The fluid channel is S streamlined, with low pressure drop loss, large flow rate and wide adjustable range.
High accuracy of flow characteristics.
Main technical parameters
Valve body
Type: straight through single seat casting ball valve
Nominal access: DN20, 25mm
Nominal pressure: ANSI 125, 150, 300, 600
JIS 10, 16, 20, 30, 40K
PN1.6, 4, 6.4MPa
Connection type: flange connection FF, RF, RJ, LG, groove type, embedded type.
Flange standard JIS B2201-1984, ANSI B16.5-1981, J B79-59, etc.
Welding connection SW
Materials: cast steel (WCB), cast stainless steel (CF8, CF8M), titanium (Ti), etc.
Upper valve cover: normal temperature (P) -17 ~ +230 C
Elongation type I (E I) -45 ~ - 17 C, +230 ~ +566 C
Elongation type II (E II) -100 ~ -45 C
Note: the working temperature should not exceed the allowable range of all materials.
Gland type: bolt compression type.
Packing: V type polytetrafluoroethylene, impregnated polytetrafluoroethylene asbestos, asbestos braiding, graphite packing.
0 valve components
Spool type: single seat plunger spool
Flow characteristics: metal seat equal percentage characteristics (%CF), linear characteristics (LCF)
The high precision flow characteristics of Cv range from 0.04 to 14 conform to IEC534-1-1976 standard.
Soft valve seat equal percentage characteristic (%TF), linear characteristic (LTF)
Material: stainless steel (304, 316, 17-4PH, 9Cr18, 316L), stainless steel surfacing Stellay alloy, bellows material 304, 316, etc.
Executive agencies
Form: LHA multi spring type thin film actuator
Diaphragm material: ethylene propylene rubber, nylon cloth, NBR nylon cloth.
Spring range: 20~100, 80 ~ 240kPa
Air supply pressure: 140 ~ 400kPa
Air source adapter: Rc1/4 "
Ambient temperature: -30 ~ +70 C
Valve action type: positive actuator realizes valve's gas-close type, reaction actuator realizes valve's gas-open type
Accessories: positioner, air filter pressure relief valve, stroke switch, retaining valve, valve position conveyor, handwheel mechanism, etc.
0 performance
Leakage: metal seat meets standard ANSI B16.104-1976 grade IV, less than 0.01% of rated capacity of valve.
The soft seat meets the standard ANSI B16.104-1976 VI grade, less than 10-7 of the rated capacity of the valve.
Return error: 3% with locator less than full stroke.
No locator is less than 5% of the total stroke.
Basic error: + 3% with locator less than full stroke.
No positioner less than 11% of full stroke.
Note: Standard V PTFE packing is adopted.
The adjustable range is 50: 1 (0.25 Cv or less than 14), 30: 1 (Cv < 0.16).
0 Cv value and stroke
Note: symbol 0, Delta and X indicate the range of valves.
The symbol delta indicates the flow characteristics of valves accord with IEC534-1-1976 standard.
Flow characteristic flow characteristic curve refer to ZHLS small caliber single seat regulating valve.
Allowable pressure difference
I. plunger spool, metal valve seat (%CF, LCF)
A. gas shut valve 100kPa
B. gas open valve 100kPa
Note: The maximum allowable pressure difference shall not exceed the maximum working pressure specified in ANSI B16.34-1981 or JIS B2201-1984 standards.
The upper number in the same cell indicates the allowable differential pressure of the valve when it is normally open and the lower number indicates the allowable differential pressure when the valve is fully closed.
II. Plunger spool, soft valve seat (%TF, LTF)
A. gas shut valve 100kPa
B. gas open valve 100kPa
Note: The maximum allowable pressure difference shall not exceed the maximum working pressure specified in ANSI B16.34-1981 or JIS B2201-1984 standards.
Shape connection dimension
Flange dimensions
Note: flange A is in line with IEC534-3-1976 standard.
Size ZHLS refer to the small caliber single seat regulating valve.
Refer to ZHLS small caliber single seat regulating valve.
