Gast 4AM-NRV-70C Air Motor

Description

The 4AM-NRV-70C utilizes a 4-vane configuration, the industrial standard for efficient power delivery and high-speed stability. Because it operates entirely on compressed air, it is inherently ATEX and CE certified for hazardous locations (Group II, Cat 2), making it safe for environments where electrical sparks could cause explosions.

A standout feature of this motor is its “self-cooling” capability. As compressed air expands through the motor, it absorbs heat, allowing the unit to run in ambient temperatures up to 121°C (250°F). This makes it an excellent alternative to electric motors in high-heat industrial zones.

Brand

GAST

Since 1921, Gast Manufacturing, Inc. has been a leader in the design and manufacturing of quality air-moving products. We specialize in offering cost effective solutions for a wide variety of industries including industrial manufacturing, healthcare, and environmental cleanup applications.

Features

NEMA 56C Mounting: Features a standard C-face flange and a 5/8″ (0.625 in) keyed shaft for “drop-in” compatibility with most American gearboxes.
4-Vane Configuration: Optimized for high-speed performance and reliable start-ups across a wide pressure range.
Variable Speed & Torque: Speed can be precisely controlled from 300 to 3,000 RPM by adjusting the air pressure or flow volume.
Explosion Proof: Non-electrical design is ideal for refineries, chemical plants, and areas with combustible dust.
Instantly Reversible: A 4-way valve allows the motor to switch rotation directions instantly, even while running under load.
Stall-Safe: Can be stalled indefinitely without damage, overheating, or the risk of electrical burnout.

Specifications

Feature	Specification
Maximum Power	1.7 hp (1.27 kW)
Maximum Speed	3,000 RPM
Max Air Consumption	78 CFM ( $133 m^3/h$ )
Maximum Torque	56 lb-in (6.3 Nm)
Starting Torque @ 80 psi	42 lb-in (4.7 Nm)
Port Size	1/4″ NPT
Shaft Diameter	0.625 in (5/8″)
Net Weight	12 lbs (5.4 kg)

Applications

Chemical & Paint Agitators: Driving mixers in environments where flammable vapors are present.
Conveyor Systems: Powering transport lines in “wash-down” or high-heat zones.
Pump Drives: Operating small centrifugal or gear pumps in hazardous processing areas.
OEM Machinery: Integrated into specialized equipment requiring a compact, spark-free NEMA motor.
Foundry Equipment: Working near furnaces where electric motor insulation would fail due to extreme heat.