Industrial automation valve
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GEROYAL, as a manufacturer and
supplier of high quality industrial control valves,
is headquartered in England
UK GERO INDUSTRIAL INTERNATIONAL LTD.
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870G Small caliber high pressure regulating valve

870G Top guide type high pressure regulating valve, adopting sleeve guide, pressure balance type valve core. The valve is mainly applicable to the working pressure, flashing, cavitation. The valve structure can be designed to diversify the caliber from DN20 ~ dn200mm, pressure range design maximum 2500lb, equipped with a variety of specifications of the electric actuator.
870G Top guide type high pressure regulating valve, adopting sleeve guide, pressure balance type valve core. The valve is mainly applicable to the working pressure, flashing, cavitation. The valve structure can be designed to diversify the caliber from DN20 ~ dn200mm, pressure range design maximum 2500lb, equipped with a variety of specifications of the electric actuator.

Product features
According to the different design parameters of a number of different antihypertensive cage sets of components in a multistage depressed, according to different design condition of the cages to ensure valve to eliminate the flashing,  cavitation phenomenon. Medium from the first contact cage set began throttling, through multiple throttle will import the high differential pressure gradually lower down, so effectively ensures the medium in the valve flow, the pressure is always in the saturation vapor pressure above, which eliminate the may produce flash, cavitation phenomenon, prolonged the service life of the valve regulating the adverse condition.

Design features
Continuous regulation in the range of high pressure difference
Multi stage decompression, anti cavitation, low noise
The valve cone seal, the sealing effect is good
Multiple design of valve core, the adjustment performance is good
Valve seat spray welding hard alloy, corrosion resistance, long life
The spool with guiding structure, Anti balance
The actuator mounted interchangeable

Technical parameters
Body form:Straight through type forging valve body
Spool form:Multi stage throttle valve core
Nominal diameter:DN20~200   NPS 3/4"~ 8"
Nominal pressure:PN10.0~42.0MPa;CALSS 600~900 LB
Applicable temperature:-196~+650℃(Optional)
Connection form:Flange, welding, screw thread
Flange distance:Meet IEC 60534
Gland form:Bolt pressing type
Sealing gasket:Saw tooth type metal gasket
Seal up:PTFE, Flexible graphite
Actuator:Pneumatic actuator, electric actuator

 
Structure and materials
1 底座Base A105 304 316 316L
2 墊片Shim 鋸齒型金屬墊片Saw tooth type metal gasket、金屬石墨墊片Metal graphite gasket
3 閥體Body A105 304 316 316L
4 導向桿Guide rod 304 304 316 316L
5 導向套Guide sleeve 304 304 316 316L
6 閥芯Seat 304 304 316 316L
7 墊片Shim 鋸齒型金屬墊片Saw tooth type metal gasket、金屬石墨墊片Metal graphite gasket
8 螺絲螺母Screw nu 304 304 316 316L
9 閥蓋Valve cover A105 304 316 316L
10 填料Packing 聚四氟乙烯PTFE、柔性石墨Flexible graphite
11 鎖緊螺母Lock nut 304 304 316 316L
12 壓套Pressing ring 304 304 316 316L
13 壓板Plate 304 304 316 316L
Executing agency
Model

Form
Pneumatic actuator Electronic electric actuator
ZH23~ZH56 3810L  RSL
Multi spring type Intelligent integration
Use Regulating、Switch Regulating
Drive pressure(range of spring)
140(20~100)Kpa  G
240(40~200)Kpa  G
280(80~240)Kpa  G
Power Supply: AC 220 V ±10% 50Hz
Power Supply: AC 380 V ±10% 50Hz
Joint Rc 1/4 Popular type: 2-PF (G1/2")
Explosion proof type: 2-PF (G3/4")
Positive effect Air pressure increase to drive the valve close Control signal increase to drive the valve close
Reaction Air pressure increase to drive the valve open Control signal increase to drive the valve open
Control signal 4~20mA.DC(Tape locator) Input output 4~20mA.DC
Hysteresis ≤ 1% FS (Tape locator) ≤ 0.8% FS
Linearity 2% FS (Tape locator) ≤ ±1% FS
Temperature -10~+70℃
Surface coating Body:Black phosphating treatment
Actuator:acrylic polyurethane enamel
Optional accessories Valve positioner
Handwheel   Solenoid valve
Travel switch   Position valve
Heater

Performance
Flow characteristics Equal percentage、Straight line
Adjustable range 50:1
Rated Cv value The percentage etc:5~300
 Allowable leakage Metallic seal:III (0.5% valve rated flow);soft seal: v
Performance index Driving mode Pneumatic Electric
  Intrinsic error % ± 1.0 ± 1.0
  Return difference % ≤ 1.0 ≤ 1.0
  Dead zone % ≤ 0.6 ≤ 1.0
  Switch deviation % ± 2.5 ± 2.5
  Deviation of stroke % ≤ 2.5 ≤ 2.5
Control valve selection
The selection of control valves in industrial control valve selection process is particularly important, due to the various working parameters in different, choose to meet the technological requirements and the best cost control valves need experienced technical staff. Refined Europe (GEROYAL) company based on years of control valve selection calculation experience, independently developed "control valve selection software" can effectively improve the control valve selection efficiency and accuracy. GEROYAL software control valve selection, a code generation control valve comprehensive performance parameters, such as control valves, control valve specifications, calculation of control valve selection scheme comparison for the comprehensive technical documentation requirements of working condition.
case analysis
Control valve product coverage, some special cases often appear in complex condition, we GEROYAL company technical department can provide case control valve structure, materials and accessories such as a full range of your analysis report.
Provide higher implementation standards
As one of the pressure control valve pressure piping components shall be in strict accordance with relevant industry standards in design, production and testing, in strict accordance with relevant industry standards GEROYAL control valve products and design, production and testing according to a higher standard version for customers.
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