产品详情

Model Alga
Double acting pneumatic quarter-turn actuator for output torques to 248,500 Nm.双气动输出扭矩回转执行器248500牛米

Model Alga

Description
Specifications
Documentation

Double acting pneumatic quarter-turn actuator for output torques to 248,500 Nm.

Features & Benefits:

Scotch yoke design generates high break torque needed for the actuation of many quarter-turn valves.
Six bearings provide reliability, smooth operation and extended service life:

- Two bronze yoke bearings ensure minimal friction. - Two bronze sliding block bearings spread load over large surface area. - Guide block bearing and piston rod bearing of sintered bronze impregnated with PTFE increase efficiency, reduce maintenance and prolong actuator life.

Graphite-impregnated PTFE piston bearing reduces friction between the piston and cylinder bore and allows the cylinder to be operated without lubrication.
- Guide bar supports the transverse forces and insures proper support of the piston rod. Hard chrome plating on guide bar provides corrosion resistance and minimal friction loads.
  - Chrome-plated piston rods provide maximum corrosion resistance and minimal friction loads on dynamic seals.
  - Electroless nickel-plated cylinder bore provides maximum corrosion resistance and reliability.
  - Multiple external tie bar design provides maximum cylinder integrity.
  - Totally enclosed, weatherproof carbon steel housing provides maximum strength. Internal coating protects against corrosion.
  - External travel stops allow precise adjustments of ± 4° rotation at each end of travel.
  - Low hysteresis and high response enhance modulating service.
  - Available with canted or with symmetric scotch yoke mechanism to suit the valve characteristics.
  - Special coatings for offshore or corrosive environments.
  - Special version available for use with sour gas supply.
  - ATEX certified II 2 G D

Specifications

Technical Data
Supply pressure	:	1.5 to 10.5 bar
Supply medium	:	air, nitrogen or sweet gas
Output torque	:	to 248,500 Nm
		Ambient temperature
		standard range : -30°C to +100°C
		(-20°F to +210°F)
		optional ranges : -55°C to +150°C
		(-65°F to +300°F)