Frascold launches compact two-stage CO2 piston compressor range for commercial refrigeration

# What this product is

# Why Frascold positioned this range

# Key technical choices and what they mean

• Materials and surface treatments: Pistons use nitrided and brushed surfaces. Pins, bushings, cylinders and piston segments have anti‑friction finishes. Those steps reduce friction and wear, which matters when compressors run long hours under high pressure.

• Internal oil barriers: Four‑cylinder models include internal barriers between the oil sump and motor to limit oil entrainment in the suction gas stream. That helps maintain lubrication control and system stability, particularly important with CO2 where oil management affects performance.

• Stage balance and ports: The compressors are engineered with a balance between first‑ and second‑stage volumes to match CO2 compression dynamics. Multiple external ports allow integrators to connect flash tanks, desuperheaters and subcoolers for common CO2 system strategies.

# Performance and operating limits

• Pressure ratings: Maximum allowable suction (LP/MP) pressure up to 100 bar and maximum delivery (HP) pressure up to 155 bar. Those ratings suit transcritical and subcritical CO2 applications where pressures are significantly higher than many conventional refrigerants.

• Temperature and evaporation: Designed to operate up to 160°C maximum running temperature and down to −50°C minimum evaporation, supporting a wide range of refrigeration and some specialty low‑temperature needs.

# Where these compressors fit

# Practical points for specifiers and installers

• Check system architecture: The ports for flash tanks and subcoolers increase flexibility but require planning for piping and controls.

• Consider oil management: The internal sump/motor barriers in four‑cylinder models reduce oil mixing, but site commissioning should include oil monitoring and routines compatible with CO2 service practice.

• Pressure capability vs. system components: The compressors' delivery/suction ratings mean downstream components (valves, heat exchangers, piping) must match or exceed those pressure limits.

# Bottom line

Frascold's two‑stage CO2 piston compressor series targets smaller, heavy‑duty commercial refrigeration systems that need the higher pressures and durability of CO2 compression in a compact package. The mechanical choices aim to extend service life under continuous duty while offering integration options for common CO2 system enhancements.