The Quicklock System

Quicklock Grooved Products are designed for use within grooved end pipe systems and are available in nominal sizes from 25 mm (1”) to 600 mm (24”) depending on the coupling figure number. The Quicklock Coupling design provides several cost advantages over welded or flanged systems. They also provide a universal means for the connection of pipe, fittings and
pipe system components.
Quicklock Couplings and Gaskets permit the selection of suitable combinations for specific application. Field modifications are easily accommodated with Quicklock Grooved Couplings as the couplings can be easily rotated, added or taken out, to allow necessary modifications.
*Flexible Couplings act as an “expansion joint”, allowing linear and angular movement of the pipe. They are designed so the coupling keys engage the pipe without gripping on the bottom of the grooves, yet still providing a restrained mechanical joint. This is particularly useful to allow for pipe expansion or contraction and piping misalignment.
*Rigid Couplings provide rigid gripping of the pipe. They are designed to bring the pipe ends closely together and the coupling clamps firmly onto the pipe OD and also onto the bottom of the grooves. Because Rigid Couplings clamp around the entire pipe surface, they provide resistance to flexural loads and therefore permit longer spacing to ASME/ANSI B31.1 (Power Piping) and ASME/ANSI B39.1 (Building Services) requirements as well as NFPA 13 (Sprinkler Systems).

first seal

First seal
C-shape rubber gasket naturally seals on pipe ends.

second seal

Second seal
The housings compress the gasket to increase the sealing capacity.

third seal

Third seal
The system pressure or vacuum will then maximize the leak-tight seal.

1. Gaskets Grade

“E” EPDM with green color code identification conforms to ASTM D-2000 for service temperature from -34 °C (-30 °F) to 110 °C (230 °F). They are recommended for hot water not to exceed 110 °C (230 °F), plus a variety of dilute acids, oil free air and many chemical services. They are not recommended for petroleum services. For dry pipe and freezer systems a FlushSeal Grade “E” Gaskets with rigid couplings is recommended.

2. Coatings

All housings are standard coated with a lead-free water based enamel paint, color red. Hot dipped zinc galvanized, epoxy or other coatings are optional. For detailed information contact the sales office.

3. Bolts and Nuts

Coupling bolts and nuts are heat treated carbon steel, oval-neck track head bolts and heavy hex nuts, conforming to ASTMA-183 minimum tensile strength of 110,000 psi. Bolts and nuts are Zinc electroplated to ASTM B633. The oval neck design prevents turning off the bolt while tightening the hex nut with a single wrench. The metric bolts and nuts are made out of zinc electroplated carbon steel.

quicklock system

Expansion and contraction
Quicklock Flexible couplings are able to absorb linear movement of the pipework due to temperature changes.
This eliminates or minimises the need for expansion joints.

The Quicklock Grooved System method allows for quick economical changes as necessary for field retrofit, with the ability to isolate equipment and piping systems for modifications and system repair.


Noise and vibration
The use of Quicklock couplings reduces noise and vibration in pipe systems.

Self restraining
The coupling housings are designed to engage into the grooves and provide a secure joint. The pipe ends are sealed by a pressure responsive gasket which is encapsulated by the ductile iron housing.

The Quicklock flexible couplings will accommodate misalignments. The maximum deflection per coupling can be found in this catalogue.

Joint deflection
Quicklock flexible couplings are within reason able to absorb pipe deflection, for further details contact your sales office. This is a great advantage in tunnel, bridge and mine applications.

Rigid Connection
The rigid couplings have a patented design that allows the copling housings to grip along the full 360° of circumference of the pipe groove. This means a more rigid and stronger connection through a range of pipe tolerances. The coupling design eliminates distortion of the gasket as the housing sections come together.

Trouble Free Design
The patented universal tongue and groove design of the coupling housings assures trouble free installation.
Potential misalignment of the coupling housings that could lead to a joint failure is a thing of the past.