DeZURIK
D10389
Page 6
November 2020
Operation
The R1 PowerRac® Spring-Return Actuator is powered pneumatically, and rotates 90° between the
open and closed positions, in the direction as described in the
“Installation” section. The spring-return
cylinder is sized for a 60 psi (415 kPa) spring only, and is limited to 100 psi (690 kPa) maximum.
Lubrication
The actuator has been lubricated at the factory and requires no routine lubrication. If the actuator is
disassembled (see Figures 5 and 6 for actuator parts identification);
apply a paint-like coating using one of these lubricants:
- Dow Corning Molykote No. 44 (
recommended
)
- Shell Retinax AM (alternate)
- Shell Lithall MDS (alternate)
to the following surfaces:
Inside diameter of cylinder tube (S6)
Chamfer for cylinder tube on cylinder cap (S11) and cylinder head of housing (S1)
O-rings (S5, S8, and S14) and grooves
Seals (S3 and S9) and grooves
Thread seal (S16)
Inside diameter of bearing (S2) located in cylinder head housing.
Outside diameter of piston rod (S4).
apply a paint-like coating using one of these lubricants:
- Keystone Zeniplex-1 (
recommended
)
- Amoco Amolith Grease #1-EP (alternate)
- Amsoil GHD (alternate)
- Mobil Mobilux EP 1 (alternate)
- Petro-Canada Vultrex MPG EP 1 (alternate)
- Shell Alvania EP 1 (alternate)
- Texaco Multifak EP 1 (alternate)
to the following surfaces:
Flat side of rack bearing (B3), before assembly
Back side of rack (B5) that contacts rack bearing, before assembly
Both bearing hubs of gear (B8), before assembly
Top cover O-ring (B10) and groove in top cover (B11), before assembly
Teeth in rack (B5) and gear (B8) after assembly (so witness marks are visible during assembly).
