|ASCO 2-Way Solenoid Valves|
ASCO's 2-Way solenoid valves have one inlet and one outlet, and are used to permit and shut off fluid flow. The two types of operations are Normally Closed (NC) and Normally Open (NO). Two types of constructions apply to 2-way solenoid valves, which are direct acting and internally piloted.
Internally piloted constructions use line pressure to assist operation. When the coil is de-energized (on a Normally Closed Valve), the pilot orifice is closed and line pressure is applied to the top of the piston or diaphragm through the bleed orifice, closing the valve.
ASCO's line of 2-way solenoid valves include General Service, Hot Water/ Steam, Potable Water and Food Service, Vacuum, Cryogenic and Liquid C02, Air Operated, Proportional, Intrinsically Safe, Low Power, Isolation/ Shielded Core, Long Life / Quiet, Ammonia, Dry Air, Magnetic Latching and Medical/ Analytical.
Two-way solenoid valves have one inlet and one outlet, and are used to permit and shut off fluid flow.
Two Types of Operations Apply
Normally Closed (NC)
Fluid is shut off when the coil is de-energized, flows through the valve when the coil is energized.
Normally Open (NO)
Fluid flows through the valve when the coil is de-energized, shuts off when the coil is energized.
Two Types of Constructions Apply
When the solenoid is energized, the core directly opens the orifice of a Normally Closed valve or closes the orifice in a Normally Open valve. The valve will operate at pressures from 0 psi to its rated maximum. The force needed to open the valve is proportional to the orifice size and fluid pressure. As orifice size increases, so does the required force. To open larger orifices without increasing solenoid size, internal pilots are used.
These valves use line pressure to assist operation.
When the coil is de-energized (on a Normally Closed valve), the pilot orifice is closed and line pressure is applied to the top of the piston or diaphragm through the bleed orifice, closing the valve. When the coil is energized, the core opens the pilot orifice, relieving pressure from the diaphragm or piston. Line pressure, alone, opens the valve by lifting the diaphragm or piston off the main orifice.
Standard and Optional Features
Solenoid valves are supplied, as listed, with either RedHat II molded epoxy solenoids or RedHat solenoids with metal enclosures. RedHat II valves are identified by the letter “G” or “H” in their catalog numbers; e.g., 8030G016. Many optional features may be added to your valves; e.g., high-temperature Class H molded coils, manual operators, and metering devices.
|General Service – Air/Inert Gas, Water, Lt. Oil (up to 300 SSU) service at moderate temperatures.|
|Hot Water Service – High temperature fluid applications such as laundries, molding, sterilizing, autoclaves, steam atomization, etc.|
|Potable Water and Food Service – NSF listed valves designed for use in drinking water systems and food service equipment.|
|Vacuum – Designed for Low Vacuum (to 29″Hg) to High Vacuum (to 10-6 Torr) applications.|
|Cryogenic and Liquid CO2 – Designed to control Cryogenic fluids to –320°F (-196°C) and Liquid CO2 to –75°F (-59°C)|
|Air Operated – Uses auxiliary compressed air or water source to shift valve, rather than a solenoid operator.|
|Proportional – Uses electrical input signal to control pressure or flow output.|
|Intrinsically Safe – Designed solely for use in intrinsically safe areas with properly approved and sized current and voltage limiting barriers.|
|Low Power – 1.4 W low wattage coil to provide PLC and DCS compatibility for BUS network and traditional wiring, reduced battery drain, reduced wiring cost, reduced temperature rise, energy savings.|
|Isolation / Shielded Core – Harsh and corrosive fluid control applications.|
|Long Life / Quiet – Designed for quiet operation and long life, up to 20 million cycles, in dry air or gas applications.|
|Ammonia - Designed for use with anhydrous and gaseous ammonia.|
|Dry Air - Designed for use in applications which require air to be free of lubricants.|
|Magnetic Latching - Ideal for remote applications where continuously powered devices can’t be used, such as irrigation systems.|
|Medical/Analytical - ASCO Miniature general service, isolation, pinch, and proportional valves are utilized for the precise and reliable control of liquids and gases in medical equipment and analytical instrumentation.|
Direct Acting Low Pressure/Vacuum – 3/8″-3/4″
Valves available in normally closed and normally open constructions. Available in either AC or DC operated with brass or Stainless Steel bodies.
High Flow / Low Pressure - 1/8″-3/8″
Direct acting valves available in normally closed constructions only. Available AC operated with light weight aluminum bodies. Ideal for applications that demand high flows at low pressure.
8210 Series The Most Common Series
Air/Inert Gas, Water, Lt. Oil – 3/8″–2 1/2″ –
Solenoid pilot operated valves available in normally closed and normally open constructions. Available either AC or DC operated with Brass or Stainless Steel bodies for a wide variety of applications. Diaphragm constructions from 3/8″–1 1/2″, piston constructions from 3/8″–2 1/2″. Our most economical, high flow valve available.
Low Pressure - Air/Inert Gas – 3/8″–3″
Solenoid pilot operated valves available in normally closed and normally open constructions. Available either AC or DC operated with Aluminum bodies.
Slow Closing /Anti-Water Hammer – 3/8″-2 1/2″-
Solenoid pilot operated valves available in normally closed and normally open constructions. Available either AC or DC operated with brass bodies. Designed to effectively reduce damage caused by water hammer.
High Pressure – 1/4″-3/4″ –
Pilot operated solenoid valve available in a normally closed construction. They are a rugged piston construction built to withstand high pressures and are available AC or DC with brass and stainless steel bodies. Ideal for high pressure water applications (up to 1500 PSI).
Sub-Miniature Poppet - 1/8″
Direct acting, normally closed solenoid valves. Available either AC or DC operated in brass or 316 stainless steel bodies and with or without manual operators. Small poppet valve well suited for a wide variety of Air, Water, Lt. Oil Applications. Recommended for use in place of the 8225 Series valves.
Plastic Body, Air / Water – 1/4″
Direct acting valve available in a normally closed construction. Available AC or DC operated with plastic bodies designed to handle the challenges of harsh media. Ideal for water dispensing applications.
Direct Acting Poppet – 1/8″-1/4″
Direct acting solenoid poppet valves are available in normally closed and normally open constructions, AC or DC operated in brass or stainless steel bodies. High flow and a variety of elastomers for a wide range of applications.
Group Mounted Sub-Miniature Poppet - 1/8"
Direct acting, normally closed solenoid valves. Available either AC or DC operated in brass or stainless steel bodies. Small poppet valve well suited for a wide variety of Air, Water, Lt. Oil Applications.
Hot Water, Normally Closed – 3/8″–3/4″
Solenoid pilot operated diaphragm valves available either AC or DC operated with brass bodies for hot water applications.
Hot Water/Steam – 3/8″ – 2 1/2″-
Heavy duty pilot operated diaphragm and piston valves available in Normally Closed and Normally Open constructions. High flow capacity and long life. Available in AC and DC brass bodies. Rugged stainless steel piston ideal for the challenges of high temperature fluids.
Slow Closing Hot Water – 3/8″-21/2″
Solenoid pilot operated valves available in normally closed and normally open constructions. Available AC operated with brass bodies. Designed to effectively reduce damage caused by water hammer.
High Temperature Fluids, Normally Closed – 1/4″ – 1″
Solenoid pilot AC operated diaphragm valves available for Hot Water/Steam applications. Brass or Stainless Steel bodies are available.
Direct Acting Poppet, Normally Closed – 1/8″-3/8″-
Direct acting normally closed solenoid poppet valves available either AC or DC operated in brass or stainless steel bodies. High flow with stainless steel seat and teflon or EPDM disc for steam applications. Field replaceable seat/orifice design for flexibility.
Direct Acting – Straight Thru Design – 3/8″-3/4″
Unique self cleaning valves with straight through design ideal for high flow hot water / steam applications. Available AC operated in normally closed and normally open constructions with brass bodies.
Direct Acting 1/8"- 1/4"
Direct acting, Normally Closed solenoid valves with NSF 61 and 169 approvals. Available in AC or DC voltages with 316 stainless steel bodies.