ASCO

An economical, high-flow general service two-way solenoid valve, listed for air and inert gases, water, light oil, cryogenic fluids, fuel gas, LP-gas and natural gas.

Use it whenuse it when the job is straightforward on and off duty on a clean fluid and you want a part number you can get quickly -- Emerson lists it for car wash equipment, air compressors, pumps, laundry equipment and industrial water control. Start here and only move off it if the media, temperature or area classification pushes you elsewhere.

Solenoid valves with a third or fourth port so the valve can vent, divert or drive a double-acting actuator instead of only opening and closing a line.

Use it whenuse it when you are not just isolating flow -- you need to exhaust a line, switch between two paths, or pilot a larger valve or cylinder. A two-way cannot do any of those.

Add-on manual operators and replacement coils for general purpose ASCO valves; the operators are listed under the RedHat II molded-epoxy family.

Use it whenuse it when the process cannot wait for power -- a manual operator lets an operator stroke the valve during a power loss or commissioning. Coils are the usual spare, so quote them with the valve rather than after the failure.

A pressure-operated, direct acting angle-body piston valve with a straight-through body, offered in bronze or stainless steel.

Use it whenuse it when the fluid is steam or hot water, or when the line carries light slurry that would clog a conventional solenoid valve. The straight-through body gives you flow and tolerance for solids; the trade is that it needs a pilot air supply.

Emerson's broader ASCO seat valve category, sitting between the small general service solenoids and full process valves.

Use it whenuse it when you have outgrown a general service solenoid on flow or temperature but do not need an engineered control valve. Ask Emerson to size it -- this category is where the selection actually matters.

A compact two-way and three-way safety shutoff valve paired with a motorized actuator for industrial fuel burner recirculation and shutoff duty; Emerson states UL, FM and CSA approvals and shutoff in under one second.

Use it whenuse it when a burner or combustion train needs a proof-tested fuel shutoff rather than a general purpose valve -- if the insurer or the burner management system asks for UL or FM, this is the answer and a general service solenoid is not. Emerson also cites outdoor service down to well below freezing, so it suits unheated burner skids.

The wider ASCO fuel shutoff category covering gas and oil trains.

Use it whenuse it when you are quoting a combustion package and need the shutoff, vent and proving valves to come from one approved family -- mixing brands across a burner train creates approval headaches at startup.

A solenoid pilot operated diaphragm valve built specifically to deliver very fast pulses in reverse-jet dust collector systems.

Use it whenuse it when you are cleaning filter bags or cartridges -- this is the valve to replace in kind. Do not substitute a general service solenoid here; pulse duty is about how fast the valve opens and how much air it moves in that instant, not about steady flow.

The tank connections, pilots and repair kits that go with the pulse valve range.

Use it whenuse it when the baghouse is already running and you are rebuilding rather than replacing -- a diaphragm and spring kit usually restores pulse performance and is the cheaper call.

Valves that close by squeezing a flexible sleeve so the fluid never touches the valve internals.

Use it whenuse it when the fluid is abrasive, stringy or must not be contaminated -- there is no seat to wear and no crevice to trap product. Sleeve life, not valve body life, is what you plan maintenance around.

Solenoid valves that modulate flow in proportion to an electrical signal instead of only opening and closing.

Use it whenuse it when you need to trim a small flow or pressure continuously from a controller and a full control valve with a positioner would be oversized and overpriced.

ASCO's high-pressure solenoid range, including valves listed for compressed natural gas service.

Use it whenuse it when line pressure is beyond what a general service body is rated for -- CNG fueling and high-pressure gas panels are the usual cases. Get the exact pressure rating from the series datasheet rather than assuming.

Small valves for analytical, sampling and instrument-air duty.

Use it whenuse it when the valve is part of an analyzer or sample loop -- internal volume, cycle life and cleanliness matter more than flow here, which is the opposite of a process valve.