Norgren V68H-8GD-RMN Pressure Relief Valve - without gauge
Part Number: V68H-8GD-RMN
Quick Summary
V68H-8GD-RMN pressure relief valve protects compressed air systems from over-pressurisation in industrial applications. Operators often battle sudden pressure spikes that cause downtime and equipment wear, making robust relief critical. While exact certifications vary by region, look for CE conformity and SIL-capable safety controls to ensure compliance, and verify IP ratings for harsh environments. With a G1 connection, a rugged aluminium body, and an adjustable relief range, this valve integrates smoothly into existing air-prep lines while delivering predictable control. This translates into tangible business value: reduced maintenance costs, lower energy waste, and improved uptime in automated manufacturing environments.
Product Information
Extended Description
V68H-8GD-RMN Norgren: Olympian relief valves protect compressed air systems from over-pressurisation | High relief capacity, sensitive and accurate | Threaded relief port for silencer or piped exhaust
Medium
Compressed air
Operating Temperature
-20 ... 80 °C, -4 ... 176 °F
Port Size
G1
Gauge Port
Rc1/8
Maximum Inlet Pressure
20 bar
Outlet Pressure Adjustment
1 ... 10 bar, 15 ... 145 psi
Materials - Adjusting Knob
Plated steel
Materials - Body
Aluminium
Materials - Bonnet
Aluminium
Materials - Elastomers
Synthetic rubber
Dimensions - Height
232 mm
Dimensions - Length
190 mm
Dimensions - Width
108 mm
Weight
2.2 kg
Country of Origin
Czechia
Range
V68H
Series
Olympian Plus
Brand
IMI Norgren
T68H-8GB-B2N
Olympian Plus 3/2 plug-in system shut-off valve, G1
1581-90
Tamper Resistant Cover
18-001-979
Wall Bracket
V68H-KIT
Service kit V68H
MB008B
Quietaire heavy duty silencer male, R1
T40B2800
Quietaire sintered bronze silencer, R1/4
High relief capacity and precise control ensures rapid venting of excess pressure, minimizing damage to downstream components and stabilizing system performance during load changes. In automated lines, this means predictable response times and fewer pressure excursions, which translates to higher yield and less scrap. The G1 inlet and Rc1/8 gauge port support straightforward installation and easy integration with standard piping and pressure-monitoring devices, reducing commissioning time and risk. The outlet pressure is adjustable from 1 to 10 bar (15 to 145 psi), enabling exact tailoring to process needs and safeguarding tools from harmful overpressure without sacrificing productivity. Aluminum body and bonnet with a plated steel adjusting knob offer robust durability in tough plant environments, while synthetic rubber elastomers maintain sealing integrity across operating cycles. Maintenance is streamlined with the V68H-KIT service kit, compatible wall brackets (18-001-979), and compatible silencers such as MB008B and T40B2800, delivering quieter operation and easier retrofits. Operating temperature ranges from -20 to 80 °C with a maximum inlet of 20 bar, and a weight of 2.2 kg, making it a compact, reliable choice for pneumatic systems in packaging, automation, and tooling applications.
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FAQs
The V68H-8GD-RMN uses standard G1 piping and Rc1/8 gauge ports, enabling straightforward integration with common pneumatic manifolds. For secure mounting, optional wall brackets like 18-001-979 are available, and the unit can be paired with silencers MB008B or T40B2800 to reduce noise during venting. Service access is simplified with the V68H-KIT, ensuring quick maintenance and part replacement when needed.
Outlet pressure is adjustable from 1 to 10 bar (15 to 145 psi). Use the adjusting knob (plated steel) to set the relief level, then verify with your pressure gauge on the Rc1/8 port. For precise control, follow the recommended torque and calibration steps in the installation guide and consider periodic rechecks during maintenance cycles.
Yes, the valve features a gauge port (Rc1/8) to accommodate pressure measurement instrumentation, enabling accurate monitoring of relief setpoints. This makes it particularly suitable for systems requiring validated pressure profiles, compliant data logging, and integration with safety interlocks in automation cells.
The V68H-8GD-RMN tolerates a maximum inlet pressure of 20 bar and operates across -20 to 80 °C. Its compact dimensions (height 232 mm, length 190 mm, width 108 mm) and weight of 2.2 kg support installation in cramped plant spaces while maintaining robust performance in demanding environments.
Maintenance is simplified with the V68H-KIT service kit and the availability of compatible accessories, including the Wall Bracket 18-001-979 and silencers MB008B and T40B2800. Regular service and part replacement keep performance consistent, while upgrades can be implemented via standard Olympian Plus components to extend service life in high-cycle applications.