Hancock

Hancock Type 5525/5535 valves are flow control valves for continuous blowdown, the small, steady bleed that holds dissolved solids in boiler water down. A micrometer dial and pointer on the valve show the opening, so a setting can be repeated.

BoilerSupplies.com carries one Hancock family, the Hancock Flow Control Blowdown Valve, with the Type 5525 and Type 5535 listed together. The valve combines a valve and a flow control instrument, with a micrometer dial and pointer that show the opening. Product literature for the 5525/5535 gives the setting to one hundredth of a handwheel turn. The type number to order is the one on the valve already on the boiler, so read the nameplate or tag before anything else.

Key facts

• BoilerSupplies.com lists Hancock Type 5525/5535 Flow Control Continuous Blowdown Valves.

• The Hancock Type 5525/5535 is a combination of valve and flow control instrument.

• The micrometer dial and pointer on the Hancock Type 5525/5535 let the operator set the valve opening and repeat it.

• Product literature for the 5525/5535 gives the setting to one hundredth of a handwheel turn.

• Continuous blowdown bleeds a small, steady flow from the boiler to hold dissolved solids down.

Is a continuous blowdown valve the same as a surface blowdown valve or a bottom blow-off valve?

A continuous blowdown valve is often called a surface blowdown valve, and a bottom blow-off valve is a different valve for a different job. Continuous blowdown bleeds a small, steady flow from the boiler to hold dissolved solids down. Bottom blow-off is a separate, intermittent job. The Hancock Type 5525/5535 is a continuous blowdown valve.

What does the micrometer dial on a Hancock 5525/5535 do?

The micrometer dial and pointer show how far the valve is open, so a setting can be written down and repeated. Product literature for the 5525/5535 gives the setting to one hundredth of a handwheel turn. That way the operator can come back to the same opening later.

What do I copy from the old Hancock valve before I call?

Read the type number from the valve on the boiler, 5525 or 5535, first. Add the pipe size of the blowdown line, the boiler operating pressure and a clear picture of the tag. BoilerSupplies.com works from those details to identify the valve for a quote.

Which do I order, the Hancock Type 5525 or the Type 5535?

Order the type number that is on the valve in service. BoilerSupplies.com lists the two together as one product, Hancock Type 5525/5535 Flow Control Continuous Blowdown Valves, and both carry the micrometer dial and pointer. Read the number from the nameplate or tag before calling, and have the line size with it.

Copy the type number, line size and boiler pressure, take a picture of the tag, then call BoilerSupplies.com at 1-770-957-9599 or toll free 1-800-780-3776.