Yarway

Yarway is an Emerson brand of valves for boiler blowdown and blow-off service. A Yarway blowdown valve sits on the bottom blowdown line of a steam boiler. It discharges sludge, scale and sediment to the blowdown tank. A gate or globe valve on that line does not last long.

BoilerSupplies.com carries the Yarway slow opening blowdown valve in 300 lb cast steel (part 958614) and in 250 lb cast iron (part 958613). The same page lists Yarway repair kits and plungers, parts 963788 and 965064, and the Nitralloy plunger, part 933187. The choice between the two valves is pressure class and body material. Cast iron at 250 lb goes where the boiler pressure allows it. Cast steel at 300 lb goes where it does not, or where the plant standard calls for steel. A kit or plunger is ordered by the pressure class, body material and size of the valve it fits.

Key facts

• Yarway is an Emerson brand.

• BoilerSupplies.com lists the Yarway slow opening blowdown valve in 300 lb cast steel, part 958614.

• BoilerSupplies.com lists the Yarway slow opening blowdown valve in 250 lb cast iron, part 958613.

• Yarway repair kits and plungers, parts 963788 and 965064, and the Nitralloy plunger, part 933187, are on the same page.

• A blowdown valve, its repair kit and its plunger are ordered by pressure class, body material and size.

• In-stock small-pack orders placed before 2:00 PM EST, Monday through Friday, ship the same day.

Yarway calls it a blow-off valve; is that the same as a blowdown valve?

Yes. Blowdown valve, blow-off valve, bottom blow-off valve, blowdown cock and boiler drain valve all name the same valve. It sits at the bottom of a steam boiler and discharges sludge and scale. Yarway calls its line blow-off valves. The slow opening type has a handwheel and a plunger; the quick opening type has a lever. BoilerSupplies.com lists the Yarway slow opening type.

What should I have in hand to order the right Yarway valve, kit or plunger?

Four things: the pressure class (250 lb or 300 lb), the body material (cast iron or cast steel) and the valve size. Then say whether it is a whole valve, a kit or a plunger. The tag or casting marks on the valve body carry the class and material. A photo of the body and the stem end settles most questions. Add the quantity and send it for a quote.

Does my Yarway blowdown valve need a new plunger or a repair kit?

A Yarway blowdown valve needs a new plunger when the plunger is scored, pitted or worn through its hard surface. Packing leaks, or a valve that will not shut tight with a clean plunger, point to the repair kit instead. Pull the plunger with the boiler down and look at it before ordering. A new plunger is ordered by valve size and class.

Why choose the Yarway 300 lb cast steel blowdown valve over the 250 lb cast iron one?

Pressure class and plant standard decide between the two Yarway valves. Cast iron at 250 lb serves lower pressure boilers, where the operating pressure allows an iron body on the blow-off line. Cast steel at 300 lb goes where the boiler pressure is higher or where the plant specifies steel bodies on every blowdown valve. Match the class and material on the tag of the valve coming out.

What is Yarway part 958614?

Yarway part 958614 is the slow opening blowdown valve in 300 lb cast steel listed on BoilerSupplies.com. Part 958613 is the same slow opening valve in 250 lb cast iron. Parts 963788 and 965064 are the Yarway repair kits and plungers, and part 933187 is the Nitralloy plunger. Order by part number where the old valve's tag carries it, otherwise by pressure class, body material and size.

Quote requests for a Yarway valve, kit or plunger go through BoilerSupplies.com with the valve markings and the quantity, or by phone at 1-770-957-9599, toll free 1-800-780-3776.