Overview
The Norgren 5298-03 is an OEM service kit designed for the R43 series water and compressed air pressure regulators. This non-relieving regulator service kit fits 1/4″ and 3/8″ valve sizes and includes diaphragm, seat, spring, and O-ring seal. The kit enables field repair and routine maintenance of Norgren R43 regulators without requiring complete unit replacement.
Key Features
- OEM Components: Genuine Norgren parts ensure compatibility and performance
- Complete Service Set: Diaphragm, seat, spring, and sealing rings included
- Easy Tool-Free Maintenance: Regulator can be disassembled without tools or removal from the air or water line
- Brass Housing Compatibility: Works with all R43 series brass-body regulators
- Dual Service: For water and compressed air service with non-relieving operation
Technical Specifications
- Part Number: 5298-03
- Series: Norgren R43
- Compatible Port Sizes: 1/4″ and 3/8″ PTF
- Kit Contents: Diaphragm, seat, spring, O-ring seals
- Material: Brass body (regulator); OEM elastomers
- Pressure Range: 0.3 to 8.6 bar (4.35 to 124 PSI)
- Flow Rating: 0.4 dm³/s (0.8 SCFM / 24 L/min)
- Service Type: Non-relieving operation
- Adjustment Type: T-bar or push-to-lock (depends on regulator model)
Typical Applications
The Norgren 5298-03 service kit is ideal for:
- Pneumatic and hydraulic system maintenance in manufacturing and process industries
- Water supply pressure regulation in commercial and industrial plumbing
- Air compressor distribution networks requiring precise pressure control
- Preventive maintenance programs to extend regulator service life
- Field replacement of wear items in installed R43 regulators
Compatibility & Replacements
Compatible With
- Norgren R43 series pressure regulators (all sizes)
- R43-201-NNLA (1/4″ port configuration)
- R43-300-NNLA and R43-301-NNLA (3/8″ port configurations)
- R43-406-NNLA (1/2″ port — use kit 5298-10 instead)
- All non-relieving R43 brass-body regulators
Replaces / Drop-In Replacement For
This kit contains replacement components for worn or damaged internal parts in R43 regulators. It does not replace the regulator body or external housings—only the internal sealing and operational elements (diaphragm, seat, spring, O-rings).
Works With
- Norgren R43-201, R43-300, R43-301 and other 1/4″/3/8″ R43 models
- PTF (Parallel Tapered Female) thread connections
- Pneumatic and water line installations requiring regulator maintenance
- Systems operating within 0.3–8.6 bar pressure range
