Norgren V68H-6GD-RMN Pressure Relief Valve - G3/4
Part Number: V68H-6GD-RMN
Quick Summary
Norgren V68H-6GD-RMN is a pressure relief valve protecting compressed air systems from over-pressurisation. Users often struggle with unexpected pressure spikes that disrupt production and shorten tool life. Certifications to look for include CE marking, SIL safety certification, and IP ratings; the data here doesn't list them—verify with the supplier. The Olympian Plus family offers precise relief with high relief capacity, while robust materials support long service life. For maintenance teams, reliable relief helps reduce downtime and extend equipment life, delivering lower operating costs. Designed for tough environments, it handles -20 to 80 °C, with a G3/4 port and Rc1/8 gauge port for flexible integration. The combination of aluminium body and plated steel knob ensures durability across shifts in modern factories.
Product Information
Extended Description
V68H-6GD-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
G3/4
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
2.21 kg
Country of Origin
Czechia
Range
V68H
Series
Olympian Plus
Brand
IMI Norgren
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Wall Bracket
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Feature: Adjustable outlet pressure from 1 to 10 bar (15 to 145 psi) enables precise relief tuning to match each automation line. Business Impact: Reduces energy waste and prevents overshoot, improving overall equipment effectiveness (OEE) and lowering operating costs. Application: Suitable for compact plant air headers where fine pressure control is critical. Feature: G3/4 threaded port with Rc1/8 gauge port provides flexible exhaust options. Business Impact: Simplifies silencer or pipe exhaust installation, reducing installation time and noise management concerns. Application: Ideal for systems where silenced venting is required near noisy equipment. Feature: Aluminium body with aluminium bonnet and plated steel adjusting knob delivers durability and corrosion resistance. Business Impact: Extends service life and reduces maintenance intervals in harsh plant environments. Application: Heavy-duty industrial settings with frequent cycling. Feature: High relief capacity and compact Olympian Plus design enable reliable protection on mid-to-large scale lines. Business Impact: Minimizes downtime from over-pressurisation events and supports consistent production throughput. Application: Automation lines with variable load demands and rapid pressure changes. Feature: Availability of service kits and mounting options (V68H-KIT, 18-001-979 Wall Bracket) simplifies field service and retrofits. Business Impact: Lowers total cost of ownership through easy maintenance and quick on-site replacements. Application: Plants planning preventative maintenance regimes and scalable installations.
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FAQs
Install the V68H-6GD-RMN by threading the G3/4 port into the supply line and connecting the Rc1/8 gauge port for monitoring or exhaust as required. Use the available mounting options such as the 18-001-979 Wall Bracket for stable positioning, and consider the V68H-KIT service kit for easy maintenance of elastomer seals and adjusting components.
Important specifications include a G3/4 port, Rc1/8 gauge port, maximum inlet pressure of 20 bar, and an adjustable outlet pressure range of 1–10 bar (15–145 psi). Material details include aluminium body and bonnet, plated steel adjusting knob, and synthetic elastomer seals. Operating temperature is -20 to 80 °C.
Yes, with its Olympian Plus design, high relief capacity, and durable aluminium construction, the valve provides reliable over-pressurisation protection in automation lines. Its adjustable relief allows precise tuning for varying loads, while compatibility with silencers and exhaust piping simplifies integration into mid-to-large scale pneumatic systems.
The provided data does not list CE, SIL, or IP certifications for this model. When selecting for regulated or hazardous environments, verify CE marking, SIL safety certification, and IP ratings with the supplier to ensure regional compliance and safety reliability before installation.
For ongoing reliability, use the V68H-KIT service kit to refresh elastomers and moving parts during scheduled maintenance. Accessories like Quietaire MB008B silencers and T68H shut-off valves can reduce exhaust noise and improve control sequencing. The available 18-001-979 Wall Bracket simplifies mounting, enabling faster field service and reduced downtime.