| The Bray space-saving modular product line is completely enclosed and self
contained. The many features of the engineered design minimize maintenance and provide safe, simple disassembly and
assembly. The INTEGRAL PORTING (A) reduces the cost of external tubing that is also easily
damaged. Offered for the first time to the industry are the unique, lubricated ACETAL PISTON GUIDES
(B) and RINGS (C). The acetal piston guides and rings have a very low coefficient of friction and absorb the side thrusts of the
pistons. In addition, the piston cylinder walls in the body are honed to a very fine finish thus reducing the overall coefficient of
friction. These features extend the life of the actuator and make the Series 90/91 one of the most efficient actua-tors on the market. The OUTPUT SHAFT BEARINGS (D) on the top and bottom of the pinion are made of low-friction acetal. The OUTPUT SHAFT and PINION |
GEAR (E) are
one-piece, manufactured from hardened alloy steel and zinc-plated for corrosion
protection. The SHAFT POSITION INDICATOR (F) clearly shows open or closed position and is easily removable for MANUAL OVERRIDE FUNCTION of the actuator when
required. The BODY (G) is extruded aluminum with anodized corrosion protective
coating. The END CAPS (H) are epoxy coated for chemical resistance. The coating is generally resistant to dilute aqueous
acids, salts, aliphatic hydrocar-bons, detergents, petroleum solvents,
alcohols, greases and oils. |
The TRAVEL STOP (I) adjusting screws limit the travel of the actuator to specific degrees of
rotation. The PISTONS (J) are die-cast aluminum. The two PNEUMATIC SUPPLY PORTS (K) are 1/8" NPT ports. NAMUR interface is available on all actuator
sizes. All Bray Series 90/91 actuators have permanently lubricated factory packed bearings and guides. No further lubrication is necessary under normal operating
conditions. All seals, Including PISTON SEALS (L), are permanently lubricated Buna-N
O-rings. |
