ADVANTAGES AND FEATURES
OF AN AXELSON PILOT OPERATED RELIEF VALVE
VS. COMPETITIVE SPRING LOADED VALVE

ADVANTAGES AND FEATURES	AXELSON HF/HD	AXELSON HL	COMPETITIVE SPRING LOADED VALVE
Easy and economical to maintain All maintenance can be performed without removing valve from line.	YES	YES	NO
Replaceable soft seat Saves costly lapping of valve seat	YES	YES	YES
Operates without simmer at valve seat Can be set close to system operating pressure. Unaffected by vibration of pulsation.	YES	YES	NO
Block and bleed pilot as standard Reduces freeze-ups caused by pressure drop through flowing type pilots.	YES	YES	NO
Accurate setting with small volume of pressure Test fixture available for fast accurate setting	YES	YES	NO
Backflow protection Prevents flow of gas back through valve when working on line	YES	YES	NO
Combines functions of blowdown and safety valves Saves cost of additional valves and piping	YES	YES	NO
Higher capacity per valve size	YES	YES	NO
Field test of pilot set pressure Set pressure can be checked or changed with valve still in service without	NO	YES	NO
Can be used with solenoid valve For electrical or pneumatic interface	YES	YES	NO
Coated internally and externally	YES	YES	NO
Balanced pilot Allows venting into discharge system without effect of back pressure	NO	YES	NO



MAILING:	PHONE:	SHIPPING:
P.C. McKenzie Company P.O. Box 112638 Pittsburgh, PA 15241	1-877-244-4883 Fax: 412-257-8890 Phone: 412-257-8866	P.C. McKenzie Company 1365 McLaughlin Run Road Pittsburgh, PA 15241