Norgren P68F-6GB-NNN Soft Start Dump Valve - 3-17 bar
Part Number: P68F-6GB-NNN
Quick Summary
The Norgren P68F-6GB-NNN is a soft-start dump valve for compressed air systems, protecting downstream equipment during startups. Users face pressure surges, wear, and unplanned downtime when lines repressurize; this valve mitigates that by controlled downstream pressure. Regulatory alignment includes support for the European Machinery Directive and PUWER, while durable aluminium build and nitrile elastomers withstand harsh environments. This design also integrates with Norgren's Olympian Plus family for quick installations, while the 3/2 valve operation and G3/4 port support wide machine integration. Designed for ease of integration, it supports wall-mounting with common mounting hardware and provides documented CAD and installation guidance.
Product Information
Extended Description
P68F-6GB-NNN Norgren: Assists machine designers in complying with the European Machineries Directive | Can help existing machinery to comply with PUWER (Provision and Use of Work Equipment Regulations) | Controlled increase of downstream pressure on start up | High forward flow capacity | High flow dump facility
Medium
Compressed air
Operating Temperature
-20 ... 80 °C, -4 ... 176 °F
Operating Pressure
3 ... 17 bar, 44 ... 246 psi
Port Size
G3/4
Actuation
Air pilot / Spring return
Valve operation
3/2
Flow
147 dm3/sec, 312 scfm
Materials - Body
Aluminium
Materials - Elastomers
Nitrile rubber
Dimensions - Height
165 mm
Dimensions - Length
190 mm
Dimensions - Width
108 mm
Weight
3.05 kg
Country of Origin
Czechia
Range
P68F
Series
Olympian Plus
Brand
IMI Norgren
MB008B
Quietaire heavy duty silencer male, R1
T68C-8GB-B2N
Olympian Plus 3/2 plug-in system shut-off valve, G1
M/P15737
Electrical plug with cable gland
18-001-979
Wall Bracket
Feature: Soft-start launch control reduces downstream pressure spike. Business Impact: Lowers peak loads on piping, valves, and actuators, reducing downtime and maintenance costs. Application: Packaging lines, robotics cells, and automated pneumatic feeds benefit from smoother start sequences. Feature: Air pilot / spring return actuation. Business Impact: Reliable, fail-safe reset with minimal electrical wiring, lowering wiring complexity and commissioning time. Application: Any automation loop requiring robust fail-safe behavior. Feature: 3/2 valve operation with G3/4 port. Business Impact: Fast, predictable venting and reset for compact spaces, enabling compact layouts and easier retrofits. Application: Small-form pneumatic modules and end-of-arm tooling. Feature: High flow capacity (147 dm3/s / 312 scfm). Business Impact: Supports rapid pressure equalization and downstream bleed-off, improving cycle times and response. Application: High-demand pick-and-place or clamping stations. Feature: Aluminium body with Nitrile elastomers. Business Impact: Enhanced durability and chemical resistance for long service life in shop floor air systems. Application: Harsh production environments and routine maintenance intervals. Feature: Comprehensive mounting and accessories. Business Impact: Easy installation and adaptable integration with existing Norgren components, reducing downtime and enabling plug-and-play installation. Application: Walls, frames, or modular panels in automated lines. Feature: Regulatory alignment (Machinery Directive, PUWER). Business Impact: Facilitates compliance planning and risk reduction for manufacturing operations. Application: New lines and upgrades needing regulatory alignment. Feature: Availability of CAD and installation guides. Business Impact: Speeds up design validation, reduces commissioning time, and minimizes field errors. Application: Engineering design and field service.
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FAQs
Begin by isolating the line and depressurizing the circuit. Mount the valve using the supplied wall bracket or compatible hardware, connect the G3/4 inlet/outlet ports, and wire the air pilot/spring return actuation per the installation guide. Ensure downstream components can tolerate the controlled startup pressure and verify no leaks after commissioning.
Key specs include operating pressure range of 3 to 17 bar, port size G3/4, and flow capacity of 147 dm3/s (312 scfm). The valve operates in a 3/2 configuration with air pilot/spring return, and is designed for compressed air at -20 to 80 °C. These factors determine suitability for your cycle times and downstream equipment tolerance.
Yes. The Olympian Plus P68F series provides controlled downstream pressure rise during startup, which reduces surge in demanding lines such as packaging and automated assembly cells. Its compact G3/4 footprint, high flow, and robust aluminium body support fast, reliable startup sequences in tight spaces.
The valve design supports alignment with the European Machinery Directive and PUWER guidance, aiding safe and compliant machine startup sequences. While not a certification itself, its rugged build and standardised porting help engineering teams meet safety and reliability requirements on regulated lines.
Maintenance is typically straightforward due to durable aluminium and nitrile elastomer construction. ROI comes from reduced startup wear, lowered downtime, and faster line ramp-ups. The availability of CAD data and installation guides also shortens commissioning, lowering engineering hours and field service costs.