VRC-CNG
The Arrow VRC-CNG is a 150 hp two-throw separable reciprocating gas compressor. The horizontally opposed cylinders are accurately balanced for smooth running and long lasting durability at 1800 RPM. Unlike many other reciprocating compressors, the VRC-CNG has a unique three-throw crankshaft configuration that eliminates opposing cylinder off-set and the vibration associated with traditional designs. With a higher rod load capacity of 16000 maximum, it allows the compressor to reach many applications. The use of a pressurized lubrication system, highly-efficient Hoerbiger valves, industry-proven accessories, innovative engineering design, and close attention to quality make the Arrow VRC-CNG unequaled in the industry.
| VRC-CNG FEATURES |
| Arrow VRC-CNG / 8.5” x 4.25” x 2.25” x 1.125” Rated @ 150 Horsepower Motor or Engine Driven First stage 8.5” cylinder rated 250 PSIG MAWP Second stage 4.25” cylinder rated 750 PSIG MAWP Third stage 2.25” cylinder rated 2500 PSIG MAWP Final stage 1.125” cylinder rated 6000 PSIG MAWP |
VRC-CNG Compressor Frame Specifications
| VRC-CNG Specifications | |||
|---|---|---|---|
| Rated Horsepower | 150 hp | 112 kW | |
| Maximum Speed RPM | 1800 RPM | ||
| Number Of Throws | 2 | ||
| Rod Load - Tension | 8000 lb | 3629 kg | |
| Rod Load - Compression | 8000 lb | 36290kg | |
| Rod Load - Combined | 16,000 lb | 7257 kg | |
| Stroke | 3 in | 76.2 mm | |
| Piston Speed | 900 ft/min | 4.57 m/s | |
| Crankshaft Diameter | 2.50 in | 63.50 mm | |
| Crankshaft Height To Cl | 12.75 in | 323.85 mm | |
| Overall Length w/cyls. | 22.5 in | .57M | |
| Overall Width w/cyls. | 87 in | 2.21 M | |
| Unit Weight w/cyls. | 1700 lb | 771 kg | |
| Oil Pump Capacity | 4 gpm | 15 lpm | |
| Oil Heat Rejection | 3750 btu/hr | 945 kcal/hr | |
| Oil Sump Capacity | 4 gal | 15 L | |
| Components | |||
| Crankshaft Main Bearing Diameter In (mm) | 3.346 in | 84.988 mm | |
| Crankpin Diameter | 2.447 in | 62.154 mm | |
| Main Bearing Type | Spherical Roller | ||
| Connecting Rod Length Cl-Cl | 7.375 in | 187.325 mm | |
| Connecting Rod Bearing Width (Single) | 1.604 in | 40.742 mm | |
| Connecting Rod Bushing Width (Single) | 1.750 in | 44.45 mm | |
| Connecting Rod Bolts (Single) | (Four) 1/2” | ||
| Connecting Rod Bearing Width (Double) | 0.802 in | 20.371 mm | |
| Connecting Rod Bushing Width (Double) | 0.875 in | 22.225 mm | |
| Connecting Rod Bolts (Double) | (Two) 1/2” | ||
| Crosshead Surface | 5.25 in x 3.5 in | 133.35 mm x 88.90 mm | |
| Floating Crosshead Pin Diam. | 2.235 in | 56.769 mm | |
| Piston Rod Diameter | 1.125 in | 28.575 mm | |
| Materials | |||
| Frame | Class 40 Gray Iron | ||
| Crankshaft | Forging With Induction Hardened Journals | ||
| Connecting Rods | Forging | ||
| Connecting Rod Bearings | Tri-metal | ||
| Crossheads | 65-45-12 Ductile Iron | ||
| Crosshead Pins | SAE 8620 Carburized | ||
| Crosshead Pin Bushings | SAE 660 Bronze | ||
| Piston Rods | SAE 4140 - Induction Hardened | ||
| Packing Rings | Carbon Filled Teflon w/ Cast Iron Backup Rings | ||
| Pistons | Aluminum or Ductile Iron | ||
| Piston Rings | Special High-Temperature Material | ||
| Cylinders | Ductile Iron & Steel Billet | ||
