Norgren S/666/8 Inline Valves - Manual/Mechanical Roller return 3/2
Part Number: S/666/8
Quick Summary
Norgren S/666/8 inline valves provide manual/mechanical control for compact pneumatic circuits. This model is ideal when space is at a premium and reliable actuation is required in automation lines. Note that the data sheet does not specify certifications; to ensure regulatory compliance, verify CE conformity, IP ratings, and SIL compatibility in the official datasheet. The valve operates over a wide temperature and pressure range (-20 to 80 °C, 2–10 bar) and pairs with standard Pneufit C fittings and tubing, delivering a versatile, cost-effective control solution for OEMs and service providers seeking robust inline valve performance.
Product Information
Extended Description
S/666/8 Norgren: Long established and well-proven valves | Compact size | May also be used as 2/2 valves
Medium
Compressed air
Operating Temperature
-20 ... 80 °C, -4 ... 176 °F
Operating Pressure
2 ... 10 bar, 29 ... 145 psi
Port Size
G1/8
Actuation
Roller / Spring return
Function
NC
Valve operation
3/2
Dimensions - Height
19 mm
Dimensions - Length
75 mm
Dimensions - Width
34 mm
Weight
0.228 kg
Country of Origin
Czechia
Range
S/666
Series
Martonair
Brand
IMI Norgren
C02250618
Pneufit C Push-in fitting, Adaptor, Straight, External/Internal hex, 6mm, G1/8
C02470618
Pneufit C Push-in fitting, Adaptor, 90° Swivel elbow, 6mm, G1/8
T40C1800
Quietaire sintered bronze silencer, G1/8
PA2-0006025C
Polyamide tube, Natural, 25m, 6mm/4mm
M/3314
Tube cutter
PA2-0006100
Polyamide tube, Natural, 100m, 6mm/4mm
Feature: Compact inline valve design with a 75 mm length and 34 mm width. Business Impact: Reduces panel footprint and simplifies machine layout, enabling easier retrofits and streamlined installation in crowded control cabinets. Application: Packaging machinery, automation lines, and compact tooling where space is constrained. Feature: Roller / Spring return actuation. Business Impact: Provides reliable, positive reset without external power, improving cycle consistency and reducing maintenance checks. Application: NC control of pneumatic circuits in high-reliability applications. Feature: 3/2 valve operation with G1/8 port. Business Impact: Easy integration with standard fittings and tubing, minimizing custom components and leak points. Application: General automation tasks with straightforward on/off control. Feature: Temperature and pressure range (-20 to 80 °C, 2–10 bar). Business Impact: Wide operating envelope supports multiple production environments, reducing part numbers for different lines. Application: Food & beverage, packaging, and automotive assembly where environmental conditions vary. Feature: Compatibility with Pneufit C fittings and PA tubing (6 mm/4 mm). Business Impact: Quick, secure connections reduce installation time and leak risk while enabling modular tubing layouts. Application: Field upgrades and new line builds requiring fast integration. Feature: Lightweight at 0.228 kg. Business Impact: Easier installation, less stress on mounting points, and reduced dynamic load on actuators. Application: Robotic end-effectors and compact automation stations. Feature: May be used as a 2/2 valve in certain configurations. Business Impact: Flexible deployment in either 3/2 or 2/2 schemes, lowering stock complexity. Application: Versatile control in small pneumatic networks with limited ports.
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FAQs
Install the S/666/8 with G1/8 ports using standard Pneufit C fittings (C02250618 or C02470618) and compatible tubing (PA2-0006025C or PA2-0006100). Mount the valve in a stable orientation, verify no obstruction to the roller mechanism, and connect supply and output lines to the correct ports. For noise reduction and leak control, add the T40C1800 silencer where permitted and route tubing to minimize bending stress.
Key specs include medium: compressed air; operating temperature -20 to 80 °C ( -4 to 176 °F ); operating pressure 2 to 10 bar (29 to 145 psi); port size G1/8; actuation: roller/spring return; function: NC; valve operation: 3/2; dimensions: 75 mm length, 34 mm width, 19 mm height; weight 0.228 kg. This makes it suitable for compact, reliable control in a variety of pneumatic circuits.
Yes, the S/666/8 can be used as a 2/2 valve in certain configurations, offering flexibility in small pneumatic networks. When used as a 2/2 arrangement, ensure proper port blocking or configuration to maintain leak-free operation and consistent actuation timing. This flexibility helps minimize the number of distinct valve types in a line.
Compatible components include Pneufit C push-in fittings (C02250618 and C02470618), a Quietaire silencer (T40C1800) for noise reduction, and PA tubing (PA2-0006025C 25 m and PA2-0006100 100 m) in 6 mm / 4 mm sizes. These compatibility options simplify installation, reduce leak paths, and support modular, serviceable pneumatic systems.
Maintenance benefits come from a compact design, roller/spring return actuation for reliable reset, and standard port/tubing interfaces that ease inspection and part replacement. The valve’s small footprint lowers panel space requirements and potential thermally induced stress, contributing to longer service life and lower total cost of ownership over multiple production cycles.