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06TTR301 R404A Semi Hermetic Twin-Screw Compressor for Freezing Cold Room
Product Overview
High-Output Industrial Freezing Performance
Built to handle extreme low-temperature loads in large distribution cold stores, quick-freezing processing plants, and industrial blast freezers, the 06TTR301 semi hermetic screw compressor combines high volumetric output with rugged operational reliability. Powered by a 150 HP heavy-duty motor, this model delivers a displacement of 504 m³/h (301 CFM) at 60Hz and 418 m³/h (250 CFM) at 50Hz.
Calibrated for R404A, R507, and R22 low-temp refrigerants, its integrated 1-3/8 in. economizer circuit injects vapor directly into the compression pocket to maintain high refrigeration capacity and system efficiency under severe pressure ratios.
Continuous 25%-100% Load Matching
To adapt to rapid fluctuations in thermal demand during initial product pull-down or shifting storage room loading, the compressor uses a dual-solenoid stepless unloading mechanism ranging from 25% to 100%. By continually adjusting gas displacement to match immediate cooling needs, the 06TTR301 eliminates frequent motor restarts, maintains stable evaporating pressures, and lowers electrical utility costs over long running cycles.
Industrial Core Engineering & Oil Management
Weighing 630 kg, the heavy-walled housing dampens vibration in demanding mechanical room environments. The compressor relies on an internal pressure-differential lubrication scheme, completely doing away with external mechanical oil pumps.
High-Flow Line Connections: Oversized 4-1/8 in. suction and 3-1/8 in. discharge interfaces prevent gas throttling and lower line friction losses.
Integrated Reverse-Rotation Check Valve: Stops high-pressure discharge gas from reversing rotor rotation upon system shutdown.
Direct Motor Thermal Monitoring: Embedded NTC thermistor sensors continually track winding temperatures to protect against phase imbalance and overheating.
Standard & Optional Equipment
Standard Package: Terminal Connection Box, Solenoid Capacity Control Valve Group, Motor Protection Module, Suction & Discharge Shutoff Valves, Internal Lubrication Piping Assembly.
Ruifujie has built a strong reputation over more than 20 years as a global manufacturer and exporter of commercial and industrial refrigeration machinery. We supply high-efficiency screw, semi-hermetic reciprocating, scroll, and rotary compressors, as well as turnkey cold storage facilities and process cooling equipment.
Backed by full OEM/ODM manufacturing support, strict multi-point quality testing, and factory-direct pricing, Ruifujie partners with contractors, system integrators, and distributors across the Americas, Europe, the Middle East, and Asia-Pacific.
Frequently Asked Questions
Q1: How does the 06TTR301 handle rapid pull-down cycles in low-temperature cold rooms?
With a large displacement of 504 m³/h at 60Hz and an active 1-3/8 in. economizer subcooling circuit, the unit maintains high volumetric efficiency under steep compression ratios, enabling fast temperature pull-downs without overloading the 150 HP motor.
Q2: Why is Star-Delta starting recommended for a 150 HP compressor on commercial power grids?
Large industrial motors draw substantial inrush current upon starting. Star-Delta starting reduces the locked-rotor current significantly (e.g., from 1190A down to 382A on a 460V line), protecting site electrical transformers from voltage dips.
Q3: How is bearing lubrication maintained without an external mechanical oil pump?
The unit utilizes an internal differential pressure oiling circuit that naturally circulates oil to high-load SKF/NSK bearings whenever differential pressure builds across the system, removing mechanical pump failure risks.
Q4: Does the physical weight of 630 kg require special base mounting considerations?
Yes. The 630 kg cast housing provides structural rigidity that absorbs internal vibration, but installation on rigid steel rack frames with heavy-duty anti-vibration rubber isolation pads is recommended to minimize acoustic transfer into building structures.
Q5: What quality verification steps are completed prior to export packaging?
Every unit undergoes full pressure leakage testing, vacuum dehydration, functional electrical run tests, and nitrogen pre-charging before being sealed in moisture-proof barrier wrap and packaged inside heavy-duty export plywood crates.
Contact Our Sales Engineers
Need performance software runs, or formal factory quotes for the 06TTR301? Submit your project details below, and the Ruifujie technical team will respond with a tailored commercial proposal within 8 business hours.
Please include the following information in your request: