Rego CryoMac® Interface Seal Replacement (P/N 14591)

1. Overview: CryoMac® 3 / 3-50M LNG Nozzle and Interface Seal Function

The CryoMac® 3 and CryoMac® 3-50M nozzles, produced by Macro Technologies (Rego Cryomac® Series), are widely used in LNG fueling systems operating at 500 PSIG (34.5 BAR) and compliant with ISO 12617 cryogenic fueling standards.

The nozzle’s reliability depends on the integrity of its interface seal (P/N 14591) — the sealing element that ensures a tight, frost-free connection between the nozzle and vehicle receptacle during LNG transfer.

2. Common Leakage Symptoms

External leakage during fueling

• LNG or vapor visible around the receptacle joint.
• Caused by worn or contaminated interface seal (P/N 14591).

Residual vapor leakage after disconnect

• Indicates wear in the poppet assembly (P/N 13960) or seat (P/N 14255).
• Both components work together with the interface seal to maintain zero-leak performance.

Root causes include:

• Ice buildup around the shroud;
• Debris trapped between sealing surfaces;
• Thermal contraction after extended use at −320 °F (−195 °C).

3. OEM-Specified Maintenance and Replacement Intervals

According to the official CryoMac® 3 Operation and Maintenance Manual:

Tooling Reference:

Macro Technologies Seal Repair Kit (P/N 14590) and Socket Tool (T-2961).

4. XHH Seals Replacement Solution

XHH Seals manufactures precision cryogenic sealing components compatible with Rego CryoMac® 3 / 3-50M nozzles and interface seal requirements.

Our interface seal replacements are:

• Designed for: 500 PSIG systems and −196 °C operation;
• Manufactured under: ISO 9001 quality management;
• Tested for: dimensional accuracy and thermal stability;
• Verified for: drop-in fit within CryoMac® interface geometry.

5. Engineering Highlights

• Operates in the −320 °F to +140 °F range without loss of elasticity.
• Resistant to LNG media shrinkage and micro-frost fracture.
• Fabricated with cryogenic-grade fluoropolymer and precision-cut metal energizer for stable compression load.
• Field-tested for 10 000+ cycles of connect / disconnect without dimensional creep.

6. Maintenance and Handling Guidelines

1. Clean nozzle and receptacle surfaces with dry nitrogen or air before every fueling.
2. Never apply lubricants to the interface seal or seat.
3. Replace the interface seal (P/N 14591) when leakage or visible wear is detected.
4. Follow OEM torque settings during seat and poppet reassembly.
5. Verify leak-tightness with nitrogen before LNG exposure.

7. Inquiry and Technical Support

For accurate seal identification and quotation, please provide:

• Nozzle model: CryoMac® 3 / CryoMac® 3-50M
• Leak type: external / internal / preventive maintenance
• Operating conditions: temperature, pressure, media, cycle frequency
• Reference photos or sample dimensions (if available)

Email: xhh@xhh-smartech.com

Manufacturer: XHH Seals — ISO 9001 Certified Cryogenic Seal Manufacturer

Global Export: Supplying OEM-verified replacements to 60+ countries

8. References

→  Replacement Seal for JC Carter 50E701 LNG Nozzle: P/N B78705-6 Technical Specifications