Pistec valve (desire 431)

Pistech valve (Varaam 431) is a buoyancy type water level control valve, which operates the pilot valve through buoyancy and its own weight to control the opening and closing of the valve body, so as to achieve the purpose of controlling the liquid level in the low-level tank.
The pilot valve is used to realize the opening and closing of the valve through the piston. It adopts a full mechanical structure and does not require a separate power source and driving device. It has good closing and high-pressure operation performance, good durability, and is simple and practical. High-capacity water level control valve that eliminates the need to install additional piping and valves.
In addition, it adopts epoxy powder coating to provide hygienic and clean water supply, which is harmless to human body.

The basic flange type is KS B 1511

Category:
Specification
Model standard main ingredient shape
431
 50~300A 2F : GCD 450
   A : Angle
Y : Y-shaped globe
4F : STS 304
(customized)
Pistec 阀 [Varaam 431]
model 431-050 431-065 431-080 431-100 431-125 431-150 431-200 431-250 431-300
standard 50A(2″) 65A(2 1 / 2 “) 80A(3″) 100A(4″) 125A(5″) 150A(6″) 200A(8″) 250A(10″) 300A(12″)
work pressure 0.05~0.98 MPa(0.5~10 kgf/㎠)
pilot valve Female thread KSPT 1/2 (optional: NPT)
used liquid Water/diesel (optional) Inquiry/ Fluid temperature: 0°C ~ 80°C
Connection size (mm) D Øand F G large Øand H1 H2
50A 129 135 124 80 230 135 78 188
65A 140 154 136 90 290 154 88 211
80A 155 180 155 100 310 180 100 236
100A 177 220 167 115 350 220 110 270
125A 225 260 187 128 400 260 125 353
150A 253 305 211 146 480 305 143 461
200A 311 380 260 175 600 380 175 519
250A 369 455 300 210 610 455 205 615
300A 430 490 330 240 700 490 230 495
number product name texture
standard Elective
first Body Ductile Iron SSC 13
2 cover Ductile Iron SSC 13
3 piston SSC 13
4 quadrilateral Silicone Rubber
5 disk SSC 13
6 disc seal Nitrile rubber
7 Dish washing machine STS 304
8 axis STS 304
9 seat SSC 13
ten cylinder liner STS 304
11 Shaft guide brass STS 304
twelfth Speed ​​adjusting screw assembly STS 304
13 sleeve STS 304
14 O-ring (S12) Nitrile rubber
15 O-ring (P9) Nitrile rubber
16 O-shaped Nitrile rubber
17 tube STS 304
18 spring STS 304
19 nut STS 304
20 spring washer STS 304
21 piston ring Teflon
22 plug cover STS 304
23 O-shaped Nitrile rubber
※ Note: Made of stainless steel

 
Valve size mm 50 65 80 100 125 150 200 250 300
inch 2 2 1/2 _ _ 3 4 5 6 8 ten twelfth
Flow Coefficient Globe type kV 23 35 66 92 145 235 332 575 920
CV 27 41 77 107 169 274 388 672 1075
Square type kV 32 51 81 130 185 302 426 733 1150
CV 37 60 95 152 216 353 498 856 1343
Flow coefficient Kv or Cv=Q/√ΔP, Cv=1.168Kv 
Kv: flow rate Q per hour at a differential pressure of 1 (㎥/hr) (kgf/㎠)
Cv: Flow rate Q (Gal/min) per minute at differential pressure 1 (PSI)
ΔP: Differential pressure across the valve (kgf/cm2 or PSI)
Refer to standard piping diagrams when installing this valve.
This product consists of a main body and a pilot valve. The pilot valve uses our company’s standard product.
During trial operation, be sure to close the inlet/outlet valve, and then remove the foreign matter in the pipeline through the bypass.
Be sure to install a filter at the front end of the primary side of the valve, and use the speed-adjusting screw to adjust the opening and closing speed according to the site conditions during trial operation. The cut-off speed is slowed down when turned clockwise (CW) and vice versa when turned counter-clockwise (CCW).

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