Features and Benefits Safety Valves

? Soft seat design as standard. Helps

provide repeatable leak-tight performance

before and after each relief cycle.

? Leak-tight performance near set

pressure. Allows higher operating

pressure, resulting in increased process

throughput and system optimization.

? Replaceable soft seat and seals. Easy

seat and seal replacement, compared to

refurbishment (no expensive, time

consuming lapping of metal components)

results in lower long-term maintenance

costs.

? External adjustable blowdown (Types

81/83/86). Allows for precise adjustment

of reseat pressure without affecting set

pressure adjustment. Adjustment does

not require access to valve internal trim,

blowdown can be adjusted with valve in

service, helping eliminate the need for

costly removal and/or system shut down.

? Full lift at set pressure (Types 81/83/86).

No overpressure required for full lift.

Minimizes possibility of freeze-up in

applications involving a cryogenic or

refrigerant and allows for D.O.T.

applications to be set higher than

Maximum Allowable Operating

Pressure (MAOP).

? Balanced spindle design (Type 81P).

Balanced against the effects of back

pressure without the use of a bellows,

reducing cost of both the initial valve

purchase and associated long-term

maintenance.

? Meets ASME Section VIII requirements.

Provides the user third-party verification

of valve capacity and performance.

link:http://valves.pentair.com/valves/Images/ANGMC-0244-US-60s.pdf