Things to Consider in Product Selection Blog

Important Information for Product Selection

When selecting a product, we advise limiting your options first based on the product's operating principle and then secondly based on the characteristics of the sealing material. After that, you may search more precisely by coil power and voltage values, operational position and thread size.

We provide you with some technical information that we believe you might require when carrying out these filtering actions;

Direct Acting Valves
The moving core travels in the direction of the fixed core when the coil is activated. Hence, the orifice where flow occurs between the valve's intake and output is opened (Normally Closed) or closed (Normally Open) by the moveable core. The valve uses a spring to return to its initial position when the power is turned off. Between 0 bar and the desired pressure value, these valves are operable. A sealing device positioned on the moveable core provides sealing on the area where the core makes contact with the orifice. It is crucial to pick the proper raw material for the sealing element since it will come into touch with the fluid flowing through the valve.

Pilot Operated Valves
These valves function based on the pressure differential between the valve's input and outflow. The pilot orifice and the orifice above the diaphragm are both present. When a line is pressured, the line pressure exerts pressure through the diaphragm's aperture, causing the diaphragm to close tightly. As the coil is powered, the moving core opens the pilot orifice, which allows flow toward the exit to relieve part of the pressure above the diaphragm. In this instance, line pressure causes the piston or diaphragm to move up by applying force under it, opening the primary flow aperture. All of the line pressure works on the diaphragm (or piston) through the tiny flow orifice to cause the pilot orifice to shut when the solenoid is de-energized.

Suspension Diaphragm Valves
The advantages of both direct-acting and pilot-operated valves are combined in these kinds of valves. The moveable core and the diaphragm are mechanically connected, allowing the valve to be controlled mechanically with direct pull at low differential pressures and mechanically with pilot control at greater pressure levels. Once a specific differential pressure value is attained, the diaphragm fully opens. These valves are utilized in situations when a larger flow rate than that of a direct draw valve is required and the valve must function at zero pressure.

NBR (Nitrilebutadiene rubber) (GENERAL PURPOSE)
High mechanical toughness,
able to withstand mineral oils,
Range of temperatures: -10 °C to +80 °C,
Fluids Used: methane, argon, air, water, fuel, mineral oil, and town gas.

Hydrated Nitrilebutadiene Rubber, or HNBR (COMPRESSOR)
Stronger mechanically than Viton,
Able to withstand mineral oils,
Range of temperatures: -10 °C to +120 °C,
Compressor applications are among its uses.

Rubber made of ethylene propylene dienmonomer (EPDM) (HOT WATER AND 3 BAR STEAM)
Resistant to alkalis and acids with a modest concentration,
Unable to withstand oil, swells and deteriorates,
Range of temperatures: -10°C to 140°C,
Liquids Acid, alcohol, ethylene and methylene, moist steam, hot water, and ozone are all used.

VITON (FKM) (HYDRAULIC OILS)
Poor mechanical strength,
Most greases, oils, fuels, solvents, and chemicals won't harm it,
It can function in hot oils and at high temperatures,
It works in a range of temperatures from -10° C to 150° C,
It has poor resistance to liquids that include amines, esters, ketones, and ethers,
Applied in textile.

PTFE (Polytetrafluoroethylene)(TEFLON) (10 BAR FOR PISTONS, 6 BAR FOR TEFLON DIAPHRAGM IN STEAM APPLICATIONS)
Nearly all chemically insensitive,
Low pressure internal leakage from the intake to the exit is a possibility,
Range of temperatures: -10°C to 180°C,
Many chemicals, refrigerants, ammonia, and dry steam are used as liquids.

RUBIN (RUBY) (FUEL)
A tough, indestructible kind of stone,
Applied to fuel valves,
Range of temperatures: -10°C to 160°C.