HLS small diameter single-seat control valve compact structure, there are S streamlined channel, so that the pressure drop loss is small, large flow, adjustable range, high precision flow characteristics, in line with IEC534 standard. The leakage of the control valve complies with ANSI B16.104. Regulating valve with multi-spring film actuator, its compact structure, the output force, the product complies with GB / T4213-92. (Mm), nominal pressure, flow characteristics, body material, rated flow coefficient, medium type and temperature range, before and after the valve pressure (pressure), the valve diameter, Power supply voltage and control signals, other special requirements.

First, the main technical parameters

Nominal diameter: 20,25mm 
Nominal pressure: ANSI 125,150,300,600, JIS 10,16,20,30,40 K, PN1.6,4.0,6.4MPa 
Connection type: Flange connection: FF, RF, RJ, LG, groove type, embedded flange Standard: JIS B2201-1984, ANSI B16.5-1981, GB / T9112 ~ 9124-2000, etc. Welding connection: Weld SW 
Material: cast steel (ZG230-450), cast stainless steel (ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, ZG00Cr18Ni12Mo2Ti), titanium and other upper cover: room temperature (P): - 17 ~ +230 ℃ 
Elongation type I (E1): - 45 ~ -17 ° C + 230 ~ + 566 ° C 
Elongation type II (E2I): - 100 ~ -45 ° C 
Elongation type II (E2W): - 196 ~ -100 ℃ 
Note: The operating temperature is not allowed to exceed the allowable range of various materials. 
Gland type: Bolt-tight packing: V-shaped PTFE packing, impregnated PTFE impregnated asbestos packing, asbestos woven packing.
 Valve components Spool type: single seat plunger type spool. 
Flow characteristics: metal seat and other percentage characteristics (%) and linear characteristics (L), the reference flow characteristics curve 
Cv value from 0.04 to 14 high-precision flow characteristics in line with IEC534-2 standard soft seat and other percentage characteristics (%) and linear characteristics (L), the reference flow characteristics of the curve Note: on the PTFE operating temperature and Pressure, the reference flow characteristics of the material: stainless steel (1Cr18Ni9Ti, 1Cr18Ni12Mo2Ti, 17-4PH, 9Cr18, 316L), stainless steel surfacing Division too Lai alloy, titanium and corrosion-resistant alloys

Second, the flow characteristics of the curve analysis

1, high-precision flow characteristics curve (Cv = 0.4 ~ 14)

Equal percentage characteristics (% CF metal seat)	Linear property (LCF metal seat)

2, the plunger-type spool flow characteristics curve (Cv = 0.4 ~ 14)

Equal percentage characteristics (% TF soft seat)	Linear features (LTF soft seat)