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Kunkle

Kunkle Safety Valves & Relief Valves

BoilerSupplies.com stocks Kunkle safety and relief valves for boilers and steam systems, including the Model 20, 215V, 300, 537, 910, 6252 and Series 6000, plus the Model 299 drip pan elbow. Boiler technicians buy them to replace a valve that weeps, chatters or is past its test date. Read the nameplate on the old valve first: model number, inlet size, set pressure, capacity and service (steam, air or water). Match those and order, or send the details for a quote.
Kunkle Valves

About Kunkle Safety and Relief Valves

Kunkle Valve is an Emerson brand of safety and relief valves for steam, air, gas and liquid service. A Kunkle safety valve opens at its set pressure and vents a boiler, pressure vessel or steam line before pressure climbs past the vessel's rating.

BoilerSupplies.com carries Kunkle Model 20, 215V, 300, 337, 537, 910, 911, 912, 913, 930 and 6252 safety valves and the Series 6000 line. The Model 299 drip pan elbow fits the outlet of a steam safety valve, keeps the discharge pipe weight off the valve body and drains condensate. The models differ by body material, inlet size, set pressure range, capacity and the service the valve is built for: steam, air, gas or water. A replacement is picked by matching those to the nameplate on the old valve, not by fitting a valve that looks the same.

 

Key facts

  • Kunkle Valve is an Emerson brand.

  • BoilerSupplies.com lists Kunkle Model 20, 215V, 300, 337, 537, 910, 911, 912, 913, 930, 6252 and Series 6000 safety valves.

  • The Kunkle Model 299 drip pan elbow, part 0299, is on the page with the valves.

  • BoilerSupplies.com lists Kunkle Series 6000 parts 6010HGM01 and 6010GFM01 and Kunkle Model 6252 part 6252KPM01.

  • A safety valve is replaced with the same set pressure, inlet size and service as the nameplate on the valve it replaces.

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

Is a Kunkle safety valve the same as a safety relief valve, pop valve or safety blowoff valve?

Those are the four names buyers use for the Kunkle valves on BoilerSupplies.com, and they are not all the same device. A safety valve or pop valve opens fully at set pressure, the usual choice on steam. A relief valve opens in proportion to pressure, the usual choice on liquid. A safety relief valve does either job. Safety blowoff valve is the older steam term.

 

What do you need from me to get the right Kunkle valve?

The nameplate on the old valve, or a clear photo of it. It carries the model number, inlet and outlet size, set pressure, capacity and the service the valve was built for. Add the boiler or vessel it protects and its maximum allowable working pressure. With those, BoilerSupplies.com can match the model or quote the closest current one.

 

Can I set a Kunkle safety valve to a different pressure?

Not in the boiler room. A Kunkle safety valve arrives set and sealed at the pressure on its nameplate. Order the valve at the set pressure the boiler or vessel needs, and if the old valve's set pressure no longer matches the system, send both numbers with the quote request.

 

What is a Kunkle Model 299 drip pan elbow for?

The Kunkle Model 299 drip pan elbow connects a steam safety valve outlet to the discharge pipe. It carries the weight and thermal movement of the discharge pipe on its own support instead of on the valve body. Its drain lets condensate out so it does not sit on the valve seat. Order it by the valve outlet size.

 

How do I know my Kunkle safety valve needs replacing?

A Kunkle safety valve needs replacing when it weeps or simmers below set pressure, or does not reseat cleanly after it has lifted. A cut seat, a broken spring or a seized stem usually means a new valve is the faster fix on a steam boiler. Match the nameplate and order the replacement before the next inspection.

 

Send the nameplate details, or a photo of the nameplate, and the quantity through BoilerSupplies.com, or call 1-770-957-9599 or toll free 1-800-780-3776.

 

 

In-stock orders eligible for small-pack shipments placed before 2:00 PM EST, Monday through Friday, will ship the same day. If ordered after 2:00PM EST, it will ship the following business day.

Items to be returned must be approved by Power Plus International, Inc. DBA Boiler USA, and may be subjected to a restocking fee

Notice: Due to the uncontrollable metal costs, all prices and delivery times are subject to change on a daily basis.

PPI™ and Power Plus International™, and related marks and logos displayed on the Site, are our trademarks and may not be used in any way without our prior express written permission. Nothing contained on the Site shall be construed as granting, by implication, estoppel or otherwise, any license or right to use any of our marks displayed on the Site without our prior express written permission. All other trademarks not owned by us that appear on this Site are the property of their respective owners.

*NOTE: The products described herein are not manufactured by Patterson-Kelley nor is Power Plus International, Inc. DBA Boiler USA in any way associated or affiliated with "PK", Patterson-Kelley, or Harsco Corporation.

Contact Us Directly:
Mailing Address:
  • Power Plus International, Inc. DBA Boiler USA
  • 143 McDonough Parkway
  • McDonough, GA 30253
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© 2026 Power Plus International, Inc. d/b/a Boiler USA, All Rights Reserved.
Mailing Address:
  • Power Plus International, Inc. DBA Boiler USA
  • 143 McDonough Parkway
  • McDonough, GA 30253
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