LULYLOK - Fluid Connection Fittings
Safe and Secure nut for the Various Fittings
LULYLOK™ is a technology created by JPB Système as part of its mission to provide innovative solutions to secure fluid and gas connections in the aviation industry.
LULYLOK™ can be adapted to many types of fittings to eliminate the use of safety wire or complex positive locking mechanism, reduce mantenance time and eliminate FOD potential.
LULYLOK™ is a B-nut for fittings including a self-locking device, which provides the benefit to prevent inadvertent loosening in harsh environments (vibration high temperature, corrosive agents, etc.).
How does it work
Overlook on the LULYLOK™ main features
LULYLOK™ - IntroductionAdaptativeLULYLOK™ can be adapted to many types of fittings to eliminate the use of safety wire or complex locking mechanism.TechnologyLULYLOK™ is a JPB-Système’s technology to provide innovative solutions to secure fluid and gas connections.
LULYLOK™ - FeaturesNo safety wireLULYLOK™ B-Nut does not need safety wire thereby eliminating FOD, reducing maintenance costs and installation time and the possibility of injury due to a sharp wire end after cutting.One-Sided LockingLULYLOK™ mates on all standard male fitting. It locks onto the geometry of the ferrule, which is customized for each customer's application.Loosening preventionWith the spring leg feature, the LULYLOK™ generates a self-locking prevailing torque by acting on the ferrule (facets on the ferrule for example).
LULYLOK™ - FeaturesMonobloc DesignLULYLOK™ is a self-contained piece, which uses no deformed thread technology, no spring, and no complex assembly, which can generate FOD.Standard toolingLULYLOK™ has standard HEX sizes and utilizes a standard wrench to be mounted on tubing.Standard dimensionsLULYLOK™ has the same overall dimensions as the standard AN818 and is adaptable to standard hardward and tube end configurations.
LULYLOK™ - ApplicationsTo any tubingLULYLOK™ can be assembled to any standard tubing, which includes a standard nipple.
The overall weight are reduced and the overall dimensions are the same as a standard B-Nut (type AN818).Highly compatibleThe LULYLOK™ is fully compatible with all existing fittings, with either shoulder or thrust wire.
LULYLOK : Self Locking System Qualification
The LULYLOK B-Nut complies with the standard specification SAE AS85720
- Proof Pressure
- Burst Pressure
- Thermal Shock - Temperature range of -65°F (18°C) to 275°F (135°C)
- Impulse Test - 200,000 impulses pressures cycles minimum
- Repeated Connection - 25 times minimum
- Stress Corrosion (Salt Spray Testing) - per FED-STD-151 Method 811.1
- Fire - 2000°F (1993°C), 4500 btu/hour flame for 15 minutes
- Flexure Test - per ARP1185
Rotary Flexure test - LULYLOK & AN818 B-nuts comparaison
Rotary flexure test per ARP1185
Aero Fluid : MIL-H-5606-F @ 350 bars (5076 psi)
CRES 347 fitting (AMS5646)
Rotary speed : 1420 TPM
ØOD .375in (9.52 mm) / 3in (76.2 mm) length
- Seating torque :132.75 in.lb (15 N.m)
- 47% of the minimum recommended seating torque (AS85720A)
- No leakage in static.
- Leakage from the outset of the test.
- Seating torque :88.5 in.lb (10 N.m)
- 30% of the minimum recommended seating torque (AS85720A)
- No leakage from the outset of the test.
- No leakage after 11 hours of test.
LULYLOK B-Nut Benefits
When tightened to the minimum recommended torque :
- No leakage in static
- No leakage during
When tightened to a value below the minimum recommended torque :
- If no leakage in static, No leakage during operation.