Compression Fittings

External nut type series 43

External nut (compression fittings)

Rugged and durable General purpose Wide range of thread and

tube sizes For use with compressed

air, compatible oils and water

Can be used with plastic or metal tube

Suitable for low and high operating temperatures*

Vacuum to high pressure*

* see tube pressures

Thread and tube sizes

Threads range taperR 1/8, R 1/4, R 3/8, R 1/2, R 3/4, R 1

Threads range parallelG 1/8, G 1/4, G 3/8, G 1/2

Tube range mm o/d4, 6, 8, 10, 12, 14, 15, 16, 18, 22

Materials Nickel plated brass body

and nut Brass tubing sleeve

Tube

Thread

Parts of a fitting

Tubing nut Tubing sleeve Body Plastic washer on bodies

with parallel threads

Tube preparation

Tube preparation For plastic tube use a standard tube cutter to give a

square end Ensure that the tube end is clean and free from surface

damage For metal tube use correct cutting equipment and ensure

the tube end is free from burrs

900

Tube assembly

External nut compression fitting

Tube assembly

Place the tubing nut and sleeve on to the tube push the tube in up to the tube stop and hold it there Screw the tubing nut until finger tight With a spanner tighten the nut by 11/4 to 11/2 turns

Undo the joint and check the sleeve has been swaged evenly. Reassemble and tighten an extra 1/4 turn

Tube assembly

Place the tubing nut and sleeve on to the tube push the tube in up to the tube stop and hold it there Screw the tubing nut until finger tight With a spanner tighten the nut by 11/4 to 11/2 turns

Undo the joint and check the sleeve has been swaged evenly. Reassemble and tighten an extra 1/4 turn

Tube assembly

Place the tubing nut and sleeve on to the tube push the tube in up to the tube stop and hold it there Screw the tubing nut until finger tight With a spanner tighten the nut by 11/4 to 11/2 turns

Undo the joint and check the sleeve has been swaged evenly. Reassemble and tighten an extra 1/4 turn

Tube assembly

Place the tubing nut and sleeve on to the tube push the tube in up to the tube stop and hold it there Screw the tubing nut until finger tight With a spanner tighten the nut by 11/4 to 11/2 turns

Undo the joint and check the sleeve has been swaged evenly. Reassemble and tighten an extra 1/4 turn

Tube assembly

Place the tubing nut and sleeve on to the tube push the tube in up to the tube stop and hold it there Screw the tubing nut until finger tight With a spanner tighten the nut by 11/4 to 11/2 turns

Undo the joint and check the sleeve has been swaged evenly. Reassemble and tighten an extra 1/4 turn

Tube assembly

Air pressure may then be applied

Tube removal

External nut compression fitting

Tube removal (compression fitting)

Turn off and exhaust the pressure Undo the tubing nut and pull out the tube The tubing sleeve is permanently swaged to the tube The joint can be made and remade many times If the tube is cut to shorten it, a new sleeve is required but

the tubing nut can be reused

Tube removal (compression fitting)

Turn off and exhaust the pressure Undo the tubing nut and pull out the tube The tubing sleeve is permanently swaged to the tube The joint can be made and remade many times If the tube is cut to shorten it, a new sleeve is required but

the tubing nut can be reused

Tube removal (compression fitting)

Turn off and exhaust the pressure Undo the tubing nut and pull out the tube The tubing sleeve is permanently swaged to the tube The joint can be made and remade many times If the tube is cut to shorten it, a new sleeve is required but

the tubing nut can be reused

Tube removal (compression fitting)

Turn off and exhaust the pressure Undo the tubing nut and pull out the tube The tubing sleeve is permanently swaged to the tube The joint can be made and remade many times If the tube is cut to shorten it, a new sleeve is required but

the tubing nut can be reused

Fittings range

External nut compression series 43

Fittings range

Straight male adaptors taper

Straight male adaptors parallel

Straight female adaptors Male elbow adaptors Elbow banjo assemblies Straight connectors Elbow connectors Plugs ( like a solid tubing

sleeve ) Reducing connectors

Fittings range

Tee connectors Male tee adaptors Male side tee adaptors Four way connectors Bulkhead connectors Straight stem adaptors Stem tailpiece connectors Tube supports for soft

plastic tubing Conical tubing sleeves

and nuts for metal tubing

End

Pressure rating

O/D mm 4 5 6 8 10 12 14 16 22 28

Polyamide (PA) 28 31 25 19 24 18 15 18 15 15

Polyurethane (PU) 10 11 10 9 9 9

Pressure values are for a temperature range -40 OC to +20 OC

Higher temperatures OC

Pressure adjustment factor

30 40 50 60 80

0.83 0.72 0.64 0.57 0.47

bar maximum

Plastic tube

For compressed air above 16 bar consult our technical service

Pressure rating

O/D mm 4 5 6 8 10 12 16 22 28

128 138 112 81 64 81 59 53 41

Pressure values are for a temperature range -40 OC to +50 OC

Copper Annealed

Copper Half Hard 193 208 218 157 150 122 89 81 62

bar maximum

Copper and steel tube

Steel 300 250 195 160

OCAnnealed

100

Half Hard

150 175 2000.97 0.82 0.63 0.43

0.95 0.88 0.54 0.29

Pressure adjustment factors

For compressed air above 16 bar consult our technical service

Reducing connector

The ferrule has a bore to accept the smaller tube size The ferrule makes a metal to metal seal in the fitting body The tubing sleeve is for the smaller tube The nut has a reduced tube diameter and seat

Reducing connector

The ferrule has a bore to accept the smaller tube size The ferrule makes a metal to metal seal in the fitting body The tubing sleeve is for the smaller tube The nut has a reduced tube diameter and seat

Reducing connector

The ferrule has a bore to accept the smaller tube size The ferrule makes a metal to metal seal in the fitting body The tubing sleeve is for the smaller tube The nut has a reduced tube diameter and seat

Reducing connector

The ferrule has a bore to accept the smaller tube size The ferrule makes a metal to metal seal in the fitting body The tubing sleeve is for the smaller tube The nut has a reduced tube diameter and seat

Reducing connector

The ferrule has a bore to accept the smaller tube size The ferrule makes a metal to metal seal in the fitting body The tubing sleeve is for the smaller tube The nut has a reduced tube diameter and seat