Norgren M/840 Flow Control Valve - 0.3–16 bar, G3/4 Port
Part Number: M/840
Quick Summary
Norgren M/840 flow control valve regulates compressed air for industrial automation lines. Maintenance teams often face needle drift or leaks during adjustments; the captive regulating needle prevents blow-out when the knob is loosened. Certification notes: CE-marked versions and IP-rated variants are commonly expected in automation environments, while SIL-rated configurations are available for safety-critical applications. This aluminium-bodied, line-mounted regulator supports robust wall mounting and flexible installation, delivering reliable regulation with a lockable adjustment and broad operating range. The combination of durable construction and practical mounting options translates to lower maintenance costs, improved process stability, and faster commissioning across plant pneumatic systems.
Product Information
Extended Description
M/840 Norgren: Line mounted general purpose regulators | Captive regulating needle will not blow out when unscrewed | Calibrated adjusting knob, can be locked | Suitable for wall mounting | High operating pressure
Medium
Compressed air
Operating Temperature
-20 ... 80 °C, -4 ... 176 °F
Operating Pressure
0.3 ... 16 bar, 4 ... 232 psi
Port Size
G3/4
Flow
1076 l/m, 38 scfm
Materials - Body
Aluminium
Materials - Seat Seal
NBR
Dimensions - Height
122 mm
Dimensions - Length
38 mm
Dimensions - Width
184 mm
Weight
1.2 kg
Country of Origin
China
Range
M/800
Series
Martonair
Brand
IMI Norgren
Feature: Captive regulating needle prevents blow-out when unscrewed → Business Impact: Enhances maintenance safety, reduces incidental leaks and calibration drift → Application: Ideal for serviceable locations and wall-mounted panels in automation lines. Feature: Calibrated, lockable adjusting knob → Business Impact: Delivers repeatable pressure settings and audit-friendly tuning → Application: Use in regulated air circuits requiring stable output and compliance verification. Feature: Aluminium body with NBR seat seal → Business Impact: Lightweight, corrosion-resistant housing with reliable seal life, lowering long-term maintenance costs → Application: Harsh industrial environments where longevity matters. Feature: Wide operating pressure range 0.3–16 bar → Business Impact: Supports diverse pneumatic sections from precision to high-flow zones → Application: Versatile across manufacturing cells and air-handling stations. Feature: G3/4 port and line-mount compatibility → Business Impact: Easier integration with standard fittings and flexible installation → Application: Quick retrofits in existing plant air networks. Feature: 1076 l/m flow rate (38 scfm) → Business Impact: Higher throughput without sacrificing regulation quality, boosting overall productivity → Application: High-demand air tools and actuators in automation lines.
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FAQs
Begin by verifying compatible fittings, then mount the valve on the line with the supplied hardware. Connect inlet and outlet pipes to G3/4 ports, tighten fittings to spec, and ensure the captive needle is not obstructed. Use the lockable knob to set the target pressure, and perform a leak check and functional test at low flow before full operation.
The M/840 operates from 0.3 to 16 bar (4 to 232 psi). Its rated flow is 1076 liters per minute (38 standard cubic feet per minute), enabling stable regulation across most small to medium pneumatic circuits.
Yes. The unit is designed for line mounting but is also suitable for wall mounting, offering installation flexibility in control panels or compact spaces typical of automation cells.
The body is aluminium with an NBR seat seal. This combination provides a lightweight, robust housing and a durable seal resistant to common pneumatics lubricants and environmental conditions, contributing to longer service intervals in industrial environments.
Ideal for compressed air regulation in automation lines, plant air distribution, and pneumatic equipment control across manufacturing, packaging, and process industries. Its wide operating range and lockable adjustment support precise, repeatable performance in safety-conscious, rugged settings.