A **back-pressure regulator** operates similarly to a relief valve, but it focuses on controlling pressure in a steady state rather than just opening and closing. The product is designed with a sealed metal diaphragm, a small pressure differential between its opening and reseating points, and includes a nut option for panel mounting.

Category:

Description

NAI-LOK NR71 Back Pressure Regulator

Key Features

     

  • Used for pure, inert, reactive, flammable, and oxidizing gases as well as gas mixtures.
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  • Laboratory pressure control.
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  • Custom panel mounting for the regulator is acceptable.
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  • Welded metal diaphragm ensures durability.
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  • Low differential pressure between cracking and reseating points.
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  • Optional panel mount nut available.

Specifications

Parameter Details
Port Connections 1/4″ NPT
Proof Pressure 150% of maximum rated pressure
Body Material 316 Stainless Steel
Diaphragm Material Hastelloy ® / 316 Stainless Steel (standard)
O-ring Viton ®, Kalrez ®
Control Pressure Range 0-250 psig (17.2 bar)
Operating Temperature -15°F to 165°F (-26°C to 74°C)
Flow Coefficient (Cv) 0.3
Standard Options Tube fitting

Product Code Configuration Guide

Option Description / Code
Basic Series NR71
Body Material S – 316 Stainless Steel
Control Pressure Range 1 – 0-250 psig (0-17.2 bar)
Port Type 2 – NPTF
Port Size 4 – 1/4″
Gauge 0 – Without gauge
W – With gauge

Applications

     

  • Gas and liquid pressure regulation
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  • Process control systems
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  • Test benches and laboratory equipment
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  • Hydraulic and pneumatic systems