ZHLC-W bellows sealed small caliber cage type single seat regulating valve is one of Cv3000 series products. It is a kind of high performance regulating valve. It can be widely used in high pressure differential situations where liquid pressure difference exceeds 3 MPa.
main features
Equipped with multi spring film actuators, compact structure and high output power.
Valve structure is compact, fluid channel is S streamlined, pressure drop loss is small, flow is large.
Wide adjustable range
Strong valve guide and sleeve prevent liquid from flash and cavitation.
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
Main technical parameters
Valve body
Type: straight through 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, MFM, RJ, LG
Flange standard ANSI B16.5-1981, JIS B2201-1984
JB/T79.1~2-94, HG20592~20614-97, 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: cage type single seat plunger spool
Flow characteristics: metal seat equal percentage characteristics (%CC), linear characteristics (LCC)
Sleeve type: separate sleeve
Materials: stainless steel (304, 316, 17-4PH, 9Cr18, 316L), stainless steel surfacing, Taai Lai alloy, etc.
Bellows material 304, 316
Executive agencies
Type: 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 connector: 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: meet standard ANSI B16.104-1976 grade IV, less than 0.01% of rated Cv.
Return error: no locator is less than 3% of the full stroke (LHA1 is less than 5% of the full stroke).
The locator is less than 1% of the full stroke.
Basic error: no positioner is less than 5% of the total stroke.
The positioner is less than 1% of the full stroke (LHA1 band positioner is + 2%).
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 V indicate the range of valves.
Typical flow characteristic curve flow characteristic curve refer to ZHLC small caliber cage single seat regulating valve.
Allowable pressure difference
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.
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.
- digital control mechanism for digital control of valves in black frame
Shape connection dimension
Flange dimensions
Note: flange A is in line with IEC534-3-1976 standard.
Size ZHLC refer to the small diameter cage type single seat regulating valve.
Refer to ZHLC small caliber cage type single seat regulating valve
