Products

Models 910, 911, 912, 913, 916, 917, 918 and 919: ASME Section VIII, Air/Gas/Steam/Liquid, “UV” National Board certified.

Models 920, 921 and 927: ASME Section I Special use or application, “V” National Board certified. Also available for vacuum service. PED certified for non-hazardous gas. Not for use with oxidizing fluids.

Model 910
Carbon Steel (CS) body and bonnet with Stainless Steel (SS) trim.

Model 911
All SS construction.

Model 916
Same as model 910 resilient seat/seals. Superior “leak-free” performance.

Model 917
Same as model 911 except resilient seat/seals. Superior “leak-free” performance.

Model 920
Steel body and bonnet with screwed cap and stainless steel spring for organic fluid vaporizers (ASME Section I -“V” Special Use or application).

Model 921
Steel body and bonnet with plain lift lever and stainless steel spring for forced flow steam generators (ASME Section I – “V” Special Use or application).

Model 927
Steel body and bonnet with packed lift lever and SS spring for high temperature/pressure hot water boilers (ASME Section I – “V” Special Use or application).

BRONZE

Model 912
Full nozzle design. Stainless Steel (SS) warn ring and disc with brass/bronze base. Bronze/brass body and bonnet.

Model 913
Full nozzle design. Bronze/brass body and bonnet. 316 SS trim (base, disc and disc holder).

Model 918
Same as model 912 except resilient seat/seal. Superior “leak-free” performance. FM approved with 316 SS base for fire pump installations in “BDD” and “BDE” sizes.*

Model 919
Same as model 913 except resilient seat/seal. Superior “leak-free” performance. Bronze body and bonnet. 316 SS trim (base, disc and disc holder).

* Requires variations listed below for adjustable relief pressure settings:

Variation 10
60 psig to 125 psig [4.1 barg to 8.6 barg]

Variation 11
125 psig to 175 psig [8.7 barg to 12 barg]

Variation 12
176 psig to 250 psig [12.1 barg to 17.2 barg]

Features & Benefits

• Available with soft seats.
• Threaded cap standard (back pressure tight). Maximum back pressure 50 psig [3.4 barg]*.
• Hex on valve nozzle provides for easy installation.
• Warn ring offers easy adjustability.
• Pivoting disc design offers exceptional seat alignment.
• Guide to nozzle ratio reduces friction.
• Valve bodies are heavy duty casting.
• Full nozzle design for optimum flow performance.
• Threaded side outlet for piped off discharge to eliminate fugitive emissions.
• Each Kunkle valve is tested and inspected for pressure setting and leakage.