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| SchuF manufactures specialised Contol Valves for the Chemical, Petrochemical, Oil, Refining, Mining and Power industries. Our control valves range from multistage angle to multiport diverter valves. They include high pressure, high temperture let down valves, boiler, feed and start up valves, disc and piston drain valves with contoured discs and rams, distributor control valves, and bellows sealed valves. |
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| Demand continues to mount for improved comfort conditioning combined with lower operating costs. New architectural designs have created real problems for contractors and engineers to maintain humidity control at reduced loads, and to control load variations. Refrigeration and air conditioning systems are usually designed to provide a given capacity at maximum conditions. These operate with little fluctuation throughout a narrow load range. However, only the larger size machines make any provisions for operation at reduced capacity. In some systems, integral cylinder unloading, the installation of a gas engine drive with variable speed control, or even multiple smaller systems, provide a logical solution. |
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| Globe- and angle-style valves for high-pressure steam, hydrocarbon, or general service, including cavitating liquids or noisy gases and vapors. Temperatures to 537ºC and pressures to PN160 (Class 2500) and sizes from DN25 through DN100 DIN and 1 through 20 inches ANSI. ENVIRO-SEAL® and HIGH-SEAL packing systems to help ensure compliance with environmental emissions requirements. FIELDVUE® digital valve controllers. |
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High Pressure Valves and System Accessories
Haskel International offers a wide range of high pressure valves and system accessories designed to assist in the controlled use of pressure and flow-generating equipment manufactured by Haskel and others. Continuous investment in the new machinery and technology keeps Haskel at the forefront of the field. Our selection of components includes:
Air Pilot Switches
Air Pilot Switches Selection Charts
Air Operated Directional Control & Release Valves
Air Piloted Valves Typical Application
Air Piloted Valves Selection Charts
Regulating Relief Valves
Stainless Steel Check Valves
Hydraulic Accumulators & Gas Receivers
Filters
Plenum Chambers
6,000 psi Gas Storage Cylinder
High Pressure Valves, Fittings & Tubing
Port Adapters |
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MODELS : VR1E02 (PANEL MOUNTED/SUB-PLATE)
VR4* (SUB-PLATE / THREADED/CARTRDIGE)
VR5* (FLANGE MOUNTED)
VVV01 (SOLENOID VENT VALVE)
SIZES - 1/4 " TO 1-1/2"
FUNCTIONS : REDUCING / RELIEF / SEQUENCE / UNLOADER
FLOWS : 1.7 - 159 gpm / 6.6 - 600 lpm |
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Pressure valves
As screw-in cartridges or intermediate plate valves
Excellent pressure adjustment over the entire operating range
Pressure relief valves
Unloading valves
Pressure reducing valves
Proportional pressure relief valves |
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KOFLOC 6600/6800
The KOFLOC Pressure Regulating Valve MODEL 6600 SERIES is a compact, lightweight precision pressure regulator with superior repeatability to provide reliable and speedy regulations. MODEL 6600 SERIES is a non-bleed valve and has successfully been put to rigorous leak tests and is designed as a panel mount unit for easy assimilation into sensitive analytical equipment. Components are carefully cleaned before assembly, making this product ideal for used as a component of high-sensitivity instruments for analysis or other R&D activities. The MODEL 6800 SERIES is a type of check valve to obtain a constant level of pressure upstream of the valve. It makes it easier and speedier to control pressure in the tank with a large buffer, and siphoning, operations that were rather difficult with a secondary control valve commonly in use.
FEATURES
♦ Compact
♦ Low-cost
♦ Quick and easy control
♦ Clean, grease-less valve
♦ Leak-integrity
APPLICATIONS
♦ Tank-pressure control
♦ Gas mixing
♦ Research
♦ Analytical equipment
♦ General gas control
♦ Precision pressure control |
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Series PC (Pressure Compensated)
General Description
These valves are designed to regulate flow at a selected rate then maintain this flow constant within ?5% as inlet and outlet pressures may vary. However, changes in fluid temperature will prevent flow from holding constant.
There are 2 types of Series PC valves. Series PCM valves can be adjusted for required flows after being installed. Series PCK valves are factory-set for a specified flow and are not adjustable by the user |
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These high-pressure proportional relief valves regulate pressure and protect hydraulic circuits at pressures to 15 000 psi (1040 bar). Electrohydraulic models provide remote control of the relief valve setting, proportional to a variable electrical input signal.
Models are available compatible with Viscor and other calibration fluids, Skydrol and other phosphate ester fluids, various military fluids, and other special low-viscosity fluids.
Configurations include manifold mounted or line connected. Optional integral vent valve provides remote pressure control.
Two models available:
Rated to 50 US gpm at 15 000 psi (190 L/min at 1040 bar);
Rated to 75 US gpm at 9000 psi (284 L/min at 620 bar).
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The HPR module ensures the
regulation of high pressure in the
“common rail” diesel
injection systems.
The device is driven by a PC
through a RS485 serial link.
It is powered by a 115Vac or
230Vac 50/60 Hz supply and by
an 10 to 36V DC supply (battery
simulator) for actuators
command.
HPR
SYSTEM COMPOSITION
The module shows up as a 3U 19” rack.
The system is composed of :
• A CPU board that processes the information and performs the numerical
adjustment of the pressure
• A pressure sensor conditioning board :
Input signals : 0-5V or 0-32mA
Sensor supply output : +5V or +12Vdc
The actuator command boards supply can be external (connector on the
back plane) or internal (optional supply board).
It is possible to load up to 4 actuator driving boards in the same rack.
These boards allow different types of pressure regulation :
• asynchronous regulation on the rail
• output regulation of the high pressure pump
• input regulation of the high pressure pump and low pressure output
• input regulation of the low pressure pump.
Each board can drive 2 actuators (allowing to drive up to 8 actuators with
4 boards).
TYPICAL USE
The HPR is connected to the supervisor through a RS485 (MODBUS) link.
The exchanged informations are :
• pressure value set point
• type of used actuator : type 1 to 32
• regulator fault status
• time of pressure measure command
• connected sensors parameters (linearity and full scale).
• instant pressure measurement. |
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