GRF Series Non-Cycling Refrigeration Dryers

Transcription

1 GRF Series Non-Cycling Dryers

2 Why Dry Compressed Air Compressed air is a clean, convenient and versatile energy resource ideal for many industrial, commercial and instrument applications. To optimize a compressed air system the moisture and contaminants naturally concentrated in the compression cycle must be removed to avoid costly equipment failure, product contamination, and distribution system breakdown. In the compression cycle, ambient air is drawn into the compressor where the gas volume is reduced to increase pressure. Any solids, vapors or aerosols introduced into the compression cycle are concentrated in a direct correlation to the discharge pressure of the system. This process produces saturated compressed air with particulate contaminants and excess liquid at the compressor discharge. Filtration can remove the liquid water and contamination, but the moisture (humidity) needs to be removed with a compressed air dryer. A compressed air dryer suppresses the Dewpoint (temperature at which liquid moisture will condense) enabling separation to remove the liquid from the system. By removing the moisture with a dryer: reliability, efficiency and productivity can be added to a compressed air system. Dry compressed air keeps lubricants from being washed away from air tools, cylinders, air motors, and valves; extending product life and reducing maintenance requirements. Dry compressed air reduces product contamination in applications such as: mixing, conveying, agitation, cooling, or product blow down. Dry compressed air reduces distribution system corrosion that will: increase pressure drop, operational costs, generate pipe scale, cause leaks and require premature replacement. Made with Pride in the USA Great Lakes Air Products, Inc. manufactures all of its compressed air dryers in southeastern Michigan. We offer our customers a steady stream of value driven, high quality, industrial grade products with decades of proven performance. Readily available replacement components and maintenance items are locally available through the Great Lakes distribution system, or a national network of wholesale refrigeration supply houses. Base your equipment purchase on the quality and durability of American made products.

3 Features and Benefits 5-Year Product Warranty The GRF series refrigerated air dryer is manufactured to the highest quality standards. In an effort to express this quality standard and distinguish our products from competitors, we have maintained an industry leading 5-Year product warranty for over 30 years. The Great Lakes warranty covers the entire dryer for 5-Years and excludes only drain maintenance. Many competitive warranties cover only select components and or prorates a charge for replacement. With continuous improvement of quality standards, along with engineering improvements that are moving with current technology, you can be assured that Great Lakes Air Products will provide you with a quality product for years of uninterrupted service. For detailed warranty coverage and requirements consult the GRF warranty publication. GRF Series Air Dryer Operation The GRF Series air dryer takes hot saturated compressed air and cools it in a two stage process. The first stage is an Air-Air heat exchanger where the compressed air is cooled by air discharged from the stage two Air- exchanger. The next stage of cooling is accomplished in the Air-Refrigerant heat exchanger where the refrigeration system cools the process gas to a specified Dewpoint. The moisture condensed from the drop in temperature is separated and removed from the system. The cold and dry air is then becomes the cooling medium for the first stage as well as reheated prior to discharge from the dryer. The refrigeration system is comprised of a compressor that boosts the refrigeration gas pressure. As the pressure is boosted the temperature is increased through heat of compression. The heat is removed and the Freon gas is condensed to a liquid by an air or water cooled heat exchanger. The high pressure liquid is collected in a receiver then feed to the expansion valve where it is expanded at a regulated volume. The expansion of the liquid causes the Freon to cool which is the equal and opposite reaction to the heat generated by compression. The cold Freon adsorbs the heat of the compressed air stream and evaporates to a gas. Any residual liquid is collected and evaporated in a suction accumulator prior to reentering the compressor before the process repeats.

4 Quality Products start with Quality Components Thermostatic Expansion Valve Stainless steel thermostatic expansion valve that modulates refrigerant flow to match system requirements in fluctuating ambient temperatures and compressed air load. Capillary tube systems used by other manufacturers will increase or decrease refrigerant flow based upon ambient conditions with no regard to system load. High ambient temperatures or slightly clogged condensers will increase refrigerant flow without a load to balance the system. Operation under these conditions can cause premature compressor failure. Interchangeable stainless steel orifices to specifically match system design to refrigeration load. High Quality Gauges Stainless steel panel mounted gauges with brazed connections and coiled vibration eliminator removes the possibility of a refrigerant leak from a common leak point in competitors dryers. Suction Accumulators Rotolock Service ports Rotolock service valves allow isolation as well as access to the refrigeration system that aids in the long term service and maintenance of a refrigeration dryer. Suction accumulators are added to the refrigeration system to remove any damaging un-evaporated refrigerant liquid from returning to the compressor and causing premature failure. *Individual components apply to the GRF series as a whole, not all components apply to each GRF model.*

5 Quality Products start with Quality Components Refrigerant Switches & Fan Cycle Control Fan Cycle pressure switch controls allow a stable and precise refrigerant operating band in various or changing ambient conditions. High / Low pressure switches will protect the refrigeration system from out of range operation that could cause compressor failure. The high limit requires manual reset in the event of an overpressure condition which prevents the refrigeration system from short cycling in the event of condenser cooling medium loss, high ambient conditions, or dirty/clogged air cooled condensers. Oil Sight Glass Refrigerant compressors are equipped with an oil sight glasse to verify lubrication levels as well as proper gas return operating conditions. The Smart-Design solenoid drain utilizes electronic timers with diaphragm type solenoid valves. Hot-Gas Bypass Valve Heavy duty hot-gas bypass valves are specifically designed for the high pressure applications required with modern refrigerants. Unlike the commonly utilized direct acting solenoid valves, diaphragm valves keep the main stream of contaminant laden condensate away from the internal moveable piston. If particulate contaminant in the condensate stream fouls and restricts movement of the piston, the valve will fail. Diaphragm type valves also have much larger orifice and flow paths than commonly utilized direct acting valves substantially reducing the possibility of clogging the drain valve. The Smart-Design solenoid drain package also incorporates an isolation valve and strainer. This simplifies maintenance while further protecting the high quality drain system from contaminant failure. *Individual components apply to the GRF series as a whole, not all components apply to each GRF model.*

6 Non Standard Condition Capacity Correction Inlet Temperature F Ambient Temperature F psig psig Inlet Air 90 psig psig psig psig psig psig psig To obtain flow capacities at conditions other than standard 100, 100 F Inlet & 100 F Ambient), locate the multiplier at the interception of actual operating conditions. Multiply the standard rated capacity of the dryer by the selected multiplier. The result is the flow capacity of that dryer under corrected conditions. Flow rates in excess of design due to capacity correction can result in increased pressure drop. GRF 10 Automatic Expansion Valve Power Cord Forced Air Condenser Cooling Relay/Contactor Overload Protection Zero Loss Displacement Drain Model 35 F 50 F GRF-10A-t / a /8 OD See page 10 for GRF series design and selection notes. Dryer voltage must be specified, motors are not dual voltage

7 GRF Automatic Expansion Valve 9 Power Cord Relay/Contactor Overload Protection Refrigerant Suction Accumulator Zero Loss Displacement Drain GRF-20A / a 1/ / GRF-25A / a 1/ GRF-40A / a 1/ See page 10 for GRF series design and selection notes. Dryer voltage must be specified, motors are not dual voltage 220 GRF Automatic Expansion Valve On/Off Power 9 Power Cord Relay/Contactor Overload Protection Strainer with Isolation Valve GRF-50A-t / a 115/ / GRF-75A-t / a 100/ / See page 10 for GRF series design and selection notes. 220 Dryer voltage must be specified, motors are not dual voltage

8 GRF Single Phase SS Thermostatic Expansion Valve Hot Gas Bypass Capacity Control On/Off Power & Service Feed Junction Relay/Contactor Overload Protection Refrigerant Suction Accumulator ( ) Strainer with Isolation Valve GRF-100A-t / a 115/ GRF-125A-t / a 208/ GRF-150A-t / a 200/ / GRF-200A-t a 1-1/ / GRF-250A-t / a 1-1/ GRF-300A-t / a 1-1/ See page 10 for GRF series design and selection notes. Dryer voltage must be specified, motors are not dual voltage NPT 220 GRF Phase Models GRF-100A-t / a 1-1/ GRF-125A-t / a / / GRF-150A-t / a 1-1/ GRF-200A-t / a 380/ / GRF-250A-t / a 200/ / GRF-300A-t / a 1-1/ See page 10 for GRF series design and selection notes. On/Off Power & Junction Relay/Contactor & Overload Protection Oil Sight Glass SS Thermostatic Expansion Valve Hot Gas Bypass Capacity Control Fan Cycle Control Crankcase Heater High/Low Press Shutdown Rotolock Isolation Valves Strainer with Isolation Valve 220 Dryer voltage must be specified, motors are not dual voltage

9 Ref. Discharge Gauge On/Off Power & Junction Relay/Contactor & Overload Protection Oil Sight Glass SS Thermostatic Expansion Valve Hot Gas Bypass Capacity Control Fan Cycle Control Crankcase Heater High/Low Press Shutdown Refrigerant Suction Accumulator Rotolock Isolation Valves Strainer with Isolation Valve GRF GRF-400A-t a 230 / GRF-500A-t a GRF-650A-t a 200 / See page 10 for GRF series design and selection notes. 220 Dryer voltage must be specified, motors are not dual voltage Ref. Discharge Gauge Air Outlet Gauge On/Off Power & Junction Relay/Contactor & Overload Protection Oil Sight Glass SS Thermostatic Expansion Valve Hot Gas Bypass Capacity Control Fan Cycle Control Crankcase Heater High/Low Press Shutdown Refrigerant Suction Accumulator Rotolock Isolation Valves Strainer with Isolation Valve GRF GRF-800A-t a 230 / GRF-1000A-t a GRF-1200A-t a 200 / See page 10 for GRF series design and selection notes. 150 Dryer voltage must be specified, motors are not dual voltage

10 GRF Ref. Discharge Gauge Air Outlet Gauge On/Off Power & Junction Relay/Contactor Overload Protection Oil Sight Glass SS Thermostatic Expansion Valve Hot Gas Bypass Capacity Control Fan Cycle Control Crankcase Heater High/Low Press Shutdown Refrigerant Suction Accumulator Rotolock Isolation Valves Strainer with Isolation Valve GRF-1500A-t a 4 Flg / GRF-1750A-t a Flg GRF-2000A-t a Flg GRF-2250A-t a 4 Flg GRF-2500A-t a 380/ Flg / GRF-2750A-t a 6 Flg Design and Specification Information Dryer Heat Rejection & Cooling Requirements Voltage Designations Fluid Requirements Air-Cooled Units: 60 BTU/H per rated SCFM of dryer capacity to ambient Water-Cooled Units: 55.2 BTU/H per SCFM of dryer capacity to cooling fluid 4.8 BTU/H per SCFM of dryer capacity to ambient GPM per SCFM of dryer 50 F Fluid GPM per SCFM of dryer 60 F Fluid GPM per SCFM of dryer 70 F Fluid GPM per SCFM of dryer 80 F Fluid GPM per SCFM of dryer 90 F Fluid 115/ / / / GRF Series Notes: 1. Capacity reflects a maximum 100 F inlet temperature and 100 F ambient 2. The symbol "t represents a missing voltage designation see table for appropriate designation 3. Inlet/Outlet connections are NPT unless otherwise specified 4. Watts specified assume 35 F evaporator and 100 F Ambient 5. are in inches with a +/- 0.5 Tolerance, complete drawings available at 6. weight is in pounds 7. and specifications are subject to change without notice 8. Dryer voltage must be specified, motors are not dual voltage 150

11 Optional Features Digital Monitor GRF series model 75 and larger are available with an optional digital system monitor. The electronic module monitors: Air Inlet Temperature Ambient Temperature Air Outlet Temperature Dewpoint Temperature The unit has a 4-20 ma output for data logging or remote system monitoring. The monitor is not a controller and is not integrated into the dryer operation. The monitors independence eliminates the possibility of a dryer shutdown, due to electronic failure. Additional Instrumentation The GRF series dryer allows the addition of additional instrumentation. Air Inlet Gauge Air Inlet Temperature Gauge Air Outlet Gauge Air Outlet Temperature Gauge Refrigerant Gauge Air Separation Temperature (Dewpoint) Water Cooled Condenser Zero Loss Drain Upgrade The standard Smart-Design timed drain can be upgraded to a factory installed heavy duty Zero Loss drain model ZLD-P3. The GRF series is available in water cooled designs for the GRF-100 / GRF-2750 models. The design comes standard with a stainless steel (copper braze) heat exchanger and a water flow control valve. For hard water applications cleanable condensers are avaliable as an option. For aggressive water applications cupero-nickel condensers are also available as an option. Cooling water flow requirements are detailed on page 10

12 Other Products from Great Lakes Air Products GTX Series Cycling Air Dryer GMTX Series High Capacity Cycling Air Dryer Regenerative Desiccant Air Dryers Compressed Air Filtration Nitrogen Generators Distributed By: Great Lakes Air Products, Inc Commerce Drive Westland, MI USA Ph: Fx: