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Measurement Systems -   NUFLO Relief Valves

 
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Technical Data:
 In the mid-1940s, a new relief valve actuated with a pilot rather than a spring set a new standard for pressure control. The valve, manufactured over the years by companies like Garrett, USI, Axelson, and NUFLO, is now manufactured and sold by Cameron's Measurement Systems division. The NuFlo pilot-operated pressure relief valve is an example of a tradition of advanced design and high-quality manufacturing abilities. These valves offer advantages not found in other relief valves - spring or pilot operated.

Valve Types

Type HF

This is a full lift, pop-action valve with a fixed (5% to 7%) blowdown using a single non-flowing pilot. This type of valve is designed for gas and/or vapor service and is offered in sizes of 1" through 8" with operating pressures ranging from 20 psig to 6000 psig.

Type HL

This is a modulating valve with a fixed (3% to 5%) blowdown using a single non-flowing pilot. This valve is designed for gas, vapor and/or liquid service and is offered in sizes of 1" through 8" with operating pressures ranging from 15 psig to 1500 psig.

Advantages & Features

  NuFlo Pilot Operated Competitive Spring Loading Valve
  HF HL  
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 to close to system operating pessure.  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 avaiable for fs accurate setting		 Yes Yes No
Backflow protection
Prevents flow of gas back through valve when working online		 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		 No Yes No
Can be used with solenoid valve
For electric or pneumatic interface		 Yes Yes No
Coated internally and externally
Bodies and piston housings. Xylan coated or corrosion protection and lubricity		 Yes Yes No
Balanced pilot
Allows venting into discharge system without effect of back pressure		 No Yes No
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