DelTorq Rack and Pinion Actuators’ Features and Benefits

1. Two independent external travel stops permit easy and precise adjustment of ± 5° in both directions. Adjustment screws do not penetrate the pressurized body and eliminates possible leakage.

2. Modular pre-loaded spring cartridges for safe, efficient use of the actuator. Convert a double-acting actuator to a spring-return actuator by simply removing the end caps and adding from 2–6 spring cartridges on each side to accomplish the desired torque. Spring cartridges have corrosion-resistant springs.

3. Hard anodized extruded aluminum body with honed internal surface for strength and lower coefficient of friction. This ensures extended service life and low maintenance downtimes. The air passes are machined internally to avoid external tubing. The external shape is contoured and rounded to avoid buildup of contaminants.

4. Compact modular design with same body and end caps for double-acting and spring-return design combined with an adapter sleeve design to offer the most efficient use of inventory.

5. Dual rack and pinion design for compact construction, high cycle life, symmetrical mounting position, and fast and efficient operation offers both spring-to-open and spring-to-close option. Reverse rotation can be accomplished in the field by simply inverting the pistons.

6. A wide actuator base design option can be adapted to mount to valve designs requiring wider than ISO 5211 drilling. This feature, coupled with the unique shaft design, can be customized to fit your specific requirements.

7. Top-quality bearings and seals for low friction and high cycle life to ensure trouble-free operation.

8. Internal and external stainless steel fasteners and specially coated springs provide corrosion resistance in a variety of environments and applications.

9. The unique manufacturing technique of the shaft combines a high-strength alloy steel shaft, having precision-machined gear teeth, with a square precision drive. The guide bar in the piston provides an inherent blowout-proof shaft design.

10. The unique position indicator can be indexed to show an alternate position. The top of the actuator shaft has a Namur slot to drive all popular sensors and positioners.

11. The design of the stop adjustment cam permits the actuator to be locked out in the full-open or full-closed position before performing mechanical maintenance work. A special lockout enclosure is also available as an option to prevent unwanted operation.

12. Standard end caps are rounded with no crevices to accumulate contamination or corrosive chemicals. The external and internal surface is coated with an epoxy-based powder to provide resistance to atmospheric corrosion and general resistance to mild chemicals.

13. Manufactured in full compliance with the latest requirements of ISO 5211 and EN12116. Provisions for mounting solenoid valves and accessories comply with Namur VDI/VDE3845.