Pasco - Model NSF Series - Scotch Yoke Type -Pneumatic & Hydraulic Actuator
Water Ingress Protected: O-Rings are fitted on bodies, caps and so on this ensure water ingress protected. tandardization: The shaft driven accessory interface conforms to NAMUR and is identical on all NSF Series models, allowing standardization of accessory mounting hardware and installation practices. Wear Resistant: The guide rod and piston rod have an advanced surface treatment, which combined with self-lubricating bearings, provides superior wear resistance and extends the life of all sliding components.
High Efficiency
The piston rod and guide block connection. superior surface finishes and self-lubricating. Bearings maximize input energy transfer. directly to the valve stem, efficiency is further. enhanced by the tension-loaded spring, minimizing. radial loads on the piston rod.
ISO Valve Mounting
The NSF Series actuators interface meets ISO standard, and meets the dimensional requirements of ISO defined for each torque range.
Corrosion Resistant
The NSF series actuators incorporate over three stages of internal and external coatings to resist severe weather, chemical and petroleum environments. The inner surface of cylinder is coated by PTFE, enhanced corrosion resistant and self-lubricating
Modular Design
NSF series actuators have available, field serviceable drive, power, spring and override modules, the modules are removable, serviceable and interchangeable when mounted to the valve. Modules are available for separated purchase to reduce spare parts inventory
Safe Spring Module
To ensure the safety of personnel during installation and maintenance, the spring module has been designed so that it can only be removed from the power module with the spring in the fully extended position. This prevents accidental release of the spring force, protecting personnel from injury and the actuator from accidental damage.
Torque Outputs(guaranteed)
- Double acting: 302~226,400Nm
- Spring return end torques: 187~71753Nm
Operating Temperatures:
- Standard: -20°C~80°C
- Low Temperature: -40°C~80°C
- High Temperature: -20°C~150°C
Operating Pressures
- Pneumatic: 3~7 Bar
- Hydraulic: 100 Bar (Over 100bar hydraulic pressure is available upon request)
1 Safe Spring Lock
Positively locks the spring module in place under load. This prevents spring module detachment from the drive module.
2 Reduced Wear
Connects the piston rod with the guide block, compensating for side load deflection and reducing wear on rod, bearings and seals.
3 Standardized Mounting
The NAMUR mounting configuration allows standardization of mounting hardware for a wide range of shaft driven accessories.
4 Replaceable Bearings
Replaceable bearings protect sliding and rotating components, with suitability for either dry or lubricated working conditions.
5 PTFE Guide Bar
PTFE thrust bar prevents yoke pin axial movement, transferring axial loads directly to the drive module case.
6 Hydraulic Overrides for Spring Module
Inside hydraulic override cylinder module for spring-return models doesn’t increase actuator length.
7 Easy Lifting
NSF25 and larger models equipped with four lifting eyes for safe actuator handling during shipping installation and removal.
8 Integral Housing Vent
The main actuator housing incorporates an integral check valve in order to release overpressure while preventing ingress of foreign object or water
9 80° to 100° Travel Adjustment
Bi-directional travel stops integral to the actuator, the stops allow 80° to 100° total travel adjustment.
10 Roller
Rollers be used, reducing the friction between the yoke arm and pin, minimizing the wear of yoke arm and pin.
11 PTFE Guide Ring
Guide ring, made of PTFE, preventing metal to metal contact with the cylinder bore, project the cylinder not be scratched by pistons.