Push-in Fittings


Plastic Body Fittings
Invented and launched by Legris in 1969, the LF 3000® system has become universally adopted. It has been designed using a simple and widely proven operating principle which allows instant fitting. Connection of tube to fitting is made by simply pushing the tube into the fitting, no other operation is required. Disconnection is similarly "instantaneous". Attentive to market needs, Legris has taken into account the requirements of its customers, i.e. optimization of performance, iniaturisation and appearance. In order to be utilised to its maximum capability, the LF 3000®

system is available in 3 ranges :
  • * For metric tubing with BSP threads in taper, parallel or metric form.
  • * For fractional inch tubing with BSP threads in taper form.
  • * For fractional inch tubing with NPT threads.
Millions of fittings are in service throughout the world. Designed for pneumatic installations, the LF 3000 system is therefore an essential component in a wide variety of industries.

Technical Specifications
Reliable performance is dependent upon the type of tubing being used, ambient temperature and fluid conveyed together with the suitability of component materials of the fitting, according to the application.

Advantages of LF3000
  • * Full flow: as gripping and sealing within the fitting is achieved using the outside of the tube, without deformation, there is no flow restriction.
  • * Automatic sealing: the 'O' ring within the fitting provides a positive seal on the O.D. of the tube, in both static and dynamic positions, due to the optimised design of the tube guide.
  • * Light Weight: a feature introduced for improved performance, mobility and productivity.
  • * A solution for all applications: wide variety of body designs and numerous configurations, from 3 mm to 14 mm diameters.
  • * 3 types of thread : BSP parallel, BSP taper and metric.
  • * Optimised dimensions and new body designs, to satisfy the ergonomics and aesthetics of pneumatic installations.
  • * Immediate Seal: For parallel threaded fittings, by a patented built-in captive 'O' ring seal.
  • * Immediate Seal: For tapered threaded fittings, by pre-coating.
  • * Instant connection and disconnection without the use of spanners.
  • * Release buttons : available in 5 colours, to identify different circuits.

Enquiry
Stainless Steel Push-in Fittings
The LF 3800 range extends the advantages of push-in fittings -instant connection and disconnection – to a wider range of industrial applications. All stainless steel construction with FKM "O" ring seals, LF 3800 offers excellent resistance to aggressive environments and fluids;

To suit most applications, models are available :
  • * For metric tubing with BSP taper thread, BSP parallel thread and metric or NPT threads;
  • * For imperial o.d. tubing with NPT thread LF 3800 conforms to the following norms :
    • 1. ISO
    • 2. CETOP
    • 3. AFNOR
Advantages of LF3800 system
The working specification depends on the type and wall thickness of the tube, the type of fluid, fluid temperature, and ambient temperature.
  1. * Resistance to Aggressive Environments - All stainless steel construction
    • 1. Stainless steel body AISI 316
    • 2. Stainless steel washer 304 L
    • 3. Stainless steel collet 303L
  2. * FKM “O” Ring Seal
  3. * Instant manual connection and disconnection – no tools required
  4. * Full bore, without pressure drop
  5. * Automatic seal
  6. * Compatible with a wide range of tubing types
    • 1. Fluoropolymer FEP 140 tubing
    • 2. Stainless steel tube
    • 3. Semi-rigid nylon tubing
    • 4. Flexible polyurethane tubing

Function Fittings
In the field of industrial automation many functions can be controlled by purpose designed fittings. Legris Pneumatic Function Fittings have been developed to perform such functions described below.
  • * Sensor Fittings
    • - Detect pressure drop and cylinder end-of-travel, thus providing an outlet pilot signal.
  • * Pressure Regulators
    • - Regulate air pressure to/from specific pneumatic equipment.
  • * Pneumatic Soft Start Fittings
    • - Allow gradual pressure increase at start up.
  • * Pressure Reducer Fittings
    • - Enable manual adjustment of the circuit pressure applied to pneumatic equipment.
  • * Snap Connectors
    • - Isolate a circuit without venting the whole installation
  • * Mini-Ball Valves
    • - Ensure opening and closing of a pneumatic circuit.
  • * Flow Control Regulators
    • 1.Control the speed of a Pneumatic Cylinder
    • 2. Models in Polymer HR and Metal
  • * Blocking Fittings
    • - Mounted in pairs, lock the cylinder piston by simultaneously cutting off the supply and exhaust.
  • * Non-Return valves
    • - Allow air to pass in one direction whilst preventing flow in the other direction.
  • * Pneumatic Sleeve Valves
    • - Allow the air supply to be closed upstream and vented downstream.
  • * Manual Switch Operated Vent Fittings
    • - Allow the air supply to be shut-off and vented in either direction by a simple manual operation of the switch.
Anti-Spark Push-in Fittings
LF 6000 anti-spark push-in fittings combine LF 3000 technology with a protective cover specifically designed for excellent resistance to severe conditions of use, especially spark projections. Their light weight enables immediate connection and disconnection by hand, without tools.

A wide range is complemented by an offer of tubing that conforms to UL94 VO, thus providing a perfect solution for all applications submitted to aggressive environments and, in particular, spark projections. Thanks to these technical specifications, LF 6000 push-in fittings are perfectly suited for the requirements of the automotive process industry.
  • * Excellent resistance to spark projections, due to a protective cover
  • * Full fluid passage
  • * Automatic sealing
  • * Constant easy connection, by optimized gripping technology
  • * Time saving during assembly, due to manual instant connection/disconnection, no tools required
  • * Lightweight - reduces the stresses encountered on robotic equipment
Introducing LIQUIfit™
From the Trusted Inventor of the Instant Fitting.
With over 40 years of experience, Legris now presents a range of leak-free, instant fittings in a bio-based compact body.

LIQUIfit™ offers:
  • * Optimum performance suitable for contact with water, beverages and food
  • * The most compact profile on the market
  • * 100% bio-based body and thread
  • * EPDM patented sealing technology
  • * Full flow
  • * No pumping effect
  • * No need for locking clip or tube insert
  • * Minimized internal retention
  • * Immediate sealing on threads

Advantages:
Optimal sealing
  • * Quality control and date coding
  • * Automatic sealing: the D seal within the fitting provides a positive seal on the O.D. of the tube, in both static and dynamic positions, due to an optimized design of the fitting cavity.



High performance materials
  • * Suitable for: water, beverages, CO2
  • * High chemical resistance (chlorine, cleaning agents, UV)
  • * Approved quality for contact with food (FDA, NSF 61, 51, ACS)
  • * Mechanical resistance over time

Renewable bio-based material
  • * The LIQUIfit™ body is manufactured from a unique bio-based high performance polymer produced from renewable plants, to expand the use of non-fossil-based resources.
  • * CO2 emissions are divided by 5 compared to classic polymer fittings.

Advanced design (patented)
  • * The most compact profile on the market
  • * Ergonomic and aesthetic design
  • * Ergonomic release button
  • * Easy-to-clean external shapes

Innovative technology (patented)
  • * Instant connection/disconnection
  • * The much reduced movement of the LIQUIfit™ gripping system prevents any pumping effect
  • * No tube insert or locking clip required at any working temperature (with Parker-Legris Advanced PE Tubing)
  • * Advanced gripping design allows a tight bend radius without leaks
  • * Can be used with prepared metallic tubing (please consult Parker-Legris’ technical department for the groove dimensions)
Lubrication Fittings, Brass body
This range of fittings has been designed for uses involving both rotation or linear movements which require lubrication. Designed using Legris push-in technology, this range is produced with specific applications in mind, hence its
  • Emphasis on safety : the tube cannot be disconnected without using a special tool.
  • * Nnitrile seals on nut assemblies.
  • * Sealing of tube by 2 "O" rings in addition to the gripping teeth.
The characteristics provide a perfect component for such applications as :
  • Lubrication circuits on industrial machinery : wood industry, textile, paper, cement industry.
  • * Lubrication on industrial equipment and vehicles (trucks)
  • * Lubrication on public works vehicles (mobile cranes) and agricultural equipment.
Technical Specifications
Reliable performance is dependent upon the tube being used, ambient temperature and fluid conveyed together with the component materials of the fitting.

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