Retraction systems
The Surefire retraction system uses a "co-axial" mounting of the HESI rod to provide a compact fixing
arrangement. The standard retractors are available in 6", 9", 12", and 18" retraction lengths, all of
which are pneumatically operated from a nominal 6Barg. ( maximum 10Barg, minimum 3Barg )
pressure line. The air must be clean and dry. Optionally these can be provided with the 5/2 way sole-
noid factory fitted to the retractor. Solenoids are available in standard or ATEX versions as required.
The retractor is supplied separately from the HESI rod, leaving the user to fit and position both
parts. The HESI rod is inserted through the retractor, and held in position using a 2 part clamp (RET
CLMP) at the non-burner end of the unit. Optional brackets are available to fix the retractor to the
burner plate either by welding or screws. The HESI rod is then inserted complete with the tip in the
optimum ignition position as shown earlier. Once correctly fitted, the rod is clamped to the
retraction cylinder, with a 2 part clamp. 1 part is fitted to the retractor cylinder the second is fitted to
the HESI rod. These 2 items are then screwed together to set the final position. An "O" ring is
supplied, and must be fitted between the 2 clamps to provide a gas tight seal from the burner.
Retraction Coaxial system, with soft close end caps
Materials
Main cylinder Extruded Aluminum
End caps Die cast Aluminum
Retraction rod
Stainless 316
Environment Temperature
Hi Temp -10C to +150C short peak + 200C
Standard temp -40C to +80C
Weight
6”
3.8Kg
9”
4.6 Kg
12”
5.5 Kg
18”
7.1 Kg
Air supply
Clean dry air at 6Barg ( Max 10Barg Min 3Barg )
Solenoid Actuators
Electrical
24VDC 5W (110/230VAC 8.5VA option)
Environment
-40°C to 80°C
ATEX option
-40°C to 80°C
Piston mechanical dimensions
1 8
