1. Howden Wrv 204

SCREW COMPRESSORS SPECIALIST Customer Satisfaction Is Our Goal SCS is a member of ISNETWORLD for Safety Audit. In Shop Overhaul.Machine Shop In House.Cast Iron Housing Repair.Balancing.Industrial Hard Chrome Rotor and Seal Journal.Industrial Hard Chrome Piston Rod.Laser Alignment.Fast Turn Around Time.OEM Parts.Fast Respond.OEM Paint or Customer Specification.Emergency 24-7 Service.New Compressors.Preventive Maintenance Vibration Analysis Oil Analysis.Remanufactured Compressors.Exchange Program. Howden WRV 204 Screw Compressors Repair: FREE SCREW COMPRESSOR INSPECTION Let us determine the extent of your problem, give you a full report, and best plan of action to get your compressor up and running as soon as possible. SCS does offer 24/7 around the clock repairs to eliminate your downtime. In some case you could be eligible for SCS exchange program offering a very quick turnaround. SCS Screw Compressors Specialist offers free screw compressor inspections for the following brands: Trusted Compressor Overhaul and Rebuild Company.

Does anyone have a copy of a Service Manual Howden WRV 321 they would not mind. HOWDEN WRV 163-204-255 screw compressor repair manual. HOWDEN WRV 163/204/255 screw.

SCS Screw Compressor Refrigeration Repair has been servicing Screw Compressors for more than 30 years. Started working with RECO in 1985, Previous Owner Operator of RCS Refrigeration Components Service and Currently Own and operate SCS Screw Compressors Specialist. IN SHOP OVERHAUL SCS shop is equipped with all necessary tools and equipments - crane, forklift, special tool, etc.

SCS tear down table has a building oil rail drain to catch all oil drain from compressor during disassembly so there is no oil on the floor that may cause slip and fall. PPE is always available for everyone. Safety training are done year round – safety certifications is required to work in the job site. Hotshot Pickup & Delivery Services 24/7 Nationwide Hotshot Delivery Service to and from the location of the compressor needing repair.

MARINE COMPRESSORS. The Howden WRV/XRV Screw is a product of over 50 years of. Size 127-R1 127-R3 127-R4 163/1.65 163/1.93 204/1.10 204/1.45 204/1. World pioneers of rotary twin screw compressors howden manufactures oil injected and oil free rotary. Wrv 163 2 l/d options wrv 204 4 l/d options wrv 255 6 l/d opt.

Howden WRV 204 oil-injected screw compressors: Double-walled casing design, robust, proven and highly reliable oil injected range, which includes the world’s largest capacity oil injected screw compressors. Howden’s WRV range of screw compressors are well proven, offer high reliability and versatility, and are designed for a wide range of applications. Howden’s WRV range of screw compressors are well proven, offer high reliability and versatility, and are designed for a wide range of applications.

The WRV series is available in a wide choice of capacities, extending to the largest capacity oil-injected screw compressors in the world. WRV compressors use a double-walled casing for outstanding reliability and robustness, providing low noise, high pressure performance throughout their long operational life. Through our range of dedicated compressor companies, Howden brings together unparalleled experience and expertise in all aspects of gas compression equipment, with unique skills and unmatched reputation in areas where toxic, corrosive or unstable gases present added complications. In any sector, in every application where reliable, round the clock operation is paramount, Howden innovation and technology keeps the world’s industries running. Howden Compressors is a specialist manufacturer of twin screw compressors. Howden Compressors supply oil injected bare shaft compressor units to independent packagers worldwide who design and supply gas and refrigeration systems on a local basis. For high specification process critical applications Howden can offer this packaging service by use of our own specialist knowledge and capabilities.

Howden WRV 204 Features:. Sleeve Type Journal Bearings: Long operational life span.

Double Wall Construction: Low operating noise and suitable for high pressure application. Optional Material of Construction: Flexibility to match project specification (e.g. Shaft Seal Options: Variety of high quality gas seal options. Range of Capability: Probably the most comprehensive range of capacity available. Installed Compressors: More than 25,000 WRV compressors installed worldwide. Cannot surge.

High compression ratios per stage. Vibration free running.

Smooth gas flow, low pulsation. Lightweight foundations. Ability to withstand high pressure differences. Compressor Options:.

Twin wall construction with sleeve bearings. Single wall construction with roller bearings. Slide valve capacity control from 100% to 10% nominal. Inverter speed control. Variable volume ratio. Howden WRV 204 Components: ROTORS All rotors for Howden twin screw compressors are machined from solid bar or forgings on highly accurate cutting machinery. The standard material is carbon steel, but forgings or special alloys can be used for more arduous applications.

Following machining and balancing to ISO standards, male and female rotors are paired for assembly to ensure the ideal combination for maximum efficiency. CASINGS Casings are precision machined from castings using state of the art horizontal machining centres to achieve the essential close tolerances. Cast iron is the normally casing material; alternative casing materials are spheroidal graphite iron or various grades of steel. COMPRESSOR ASSEMBLY AND TESTING All oil injected twin screw compressors are factory assembled by skilled engineers. The casing components are hydraulically tested to a minimum of 1.5 times maximum operating pressure to ensure integrity. Additionally, all oil injected compressors are tested with air under water following final assembly. The compressors are then mechanically run on air test rigs to confirm that volumetric efficiency, absorbed power, oil flows and vibration levels meet the stringent acceptance standards.

Howden Compressor Refrigeration Repair Models:, Howden WRV 204 Compressor Information: VARIABLE VOLUME RATIO Two forms of variable volume control are available. ADJUSTABLE VOLUME RATIO (MVI) 2. AUTOMATIC VARIABLE VOLUME RATIO (AVI) Compressor selections need to take account of the peak operating conditions likely to be encountered. However, actual operating conditions may vary, resulting in lower efficiencies. Control of capacity and volume ratio can maintain high efficiency levels. The Howden variable Vi concept, coupled to slide valve capacity control, offers alternative control methods.

Where the pressure ratio across the compressor is consistently high or changes in pressure ratio are infrequent (e.g. The change from winter to summer conditions) then the MVi manually adjustable system will be entirely satisfactory.

With lower pressure ratios, or where condensing conditions vary frequently, the Howden automatic control AVi system can be offered. SUPERFEED The Howden superfeed system is a development of the oil injected screw compressor design. All oil injected compressors are equipped with an additional gas port, located along the length of the compression chamber. Feeding refrigerant to this port from a superfeed/economiser vessel within the refrigeration system offers increased evaporator capacity of up to 20 percent, with virtually no increase in absorbed power. ALL WRV RANGE COMPRESSORS ARE OF DOUBLE WALL CONSTRUCTION AND UTILISE WHITE METAL, SLEEVE TYPE JOURNAL BEARINGS WITH PRESSURISED SHAFT SEAL. A full range of Vi options from 2.1 to 5.8 is offered for each compressor while slide valve capacity control is a standard feature on all compressors. Many options to standard design are available, some of which are indicated below: OPTION C ‘Condition controlled’ version with reduced oil flow for dense gases and temperature control.

OPTION M ‘Mirror’ version for reverse rotation with double ended motor drive and two stage design. OPTION H ‘Higher pressure’ version for high discharge pressure. OPTION X ‘eXtra high’ discharge design. OPTION T ‘Tilting pad’ thrust bearing design, e.g. To comply with API 619. OPTION S ‘Steel casings’ for high pressure or to match specification.

Howden Wrv 204

OPTION N ‘Nodular cast iron design” again for specific project specification. HOWDEN WRV 204 FAILURE ANALYSIS: The (Mechanical seal) input shaft seal is the fragile component of any screw compressor. It becomes the first point of visible distress. The mechanical seal seen as occurring in two general areas: primary face and secondary seal. A compressor’s bearings are among vital components of a screw compressor. Bearings locate the position of the rotors with great precision. The main bearing depends on a film of oil to keep the rotor and bearing surfaces separated.

This film supports the entire weight of the rotor and its gas load. Bearings normally fail when this oil film becomes contaminated, breaks down, or if the bearing becomes overloaded. The oil film is created and maintained by the compressors lube oil system. The rotor journal is in contact with the bearing surface when at rest. With proper oil pressure that the rotor positions itself. The rotor rides on a lubricant wedge during design loads.

The thrust bearings installed in the Howden compressor are paired single-row, angular-contact ball bearings. The steel caged antifriction bearings are fitted face to face at the discharge end of the compressor. The bearings are off loaded by the use of balance pistons. The compressor achieves sufficient off loading by utilizing a single balance piston on the input end of the male rotor. Lubrication failure doesn't normally imply a total lack of lubrication. A thorough investigation may reveal too low a differential oil pressure, improper viscosity due to dilution, or product condensing due to a low discharge temperature. The vibration and sound levels of a howden compressor are rather low.

The maximum vibration level is normally around 0.2165-in./sec in the horizontal and vertical plane and 0.295-in./sec axially. These levels are measured in RMS velocity.While sound levels are subjective, changes in operating sound levels should not be ignored. The cause of abnormal sound/vibration levels can be rooted in the compressor drive, auxiliary equipment, or system gas flow. When investigating abnormal vibration levels, don’t overlook the following: Mechanical mounting and coupling alignment; Piping strain; Throttled suction; Liquid carryover; Excessive oil injection; Discharge line/vessel resonance; and Mechanical interference (rotor to slide valve, rotor to casing).

The conditions and causes listed in the previous failure analysis were kept simple. In reality, several factors often seem to occur, making the root cause of a failed component not always obvious.

Only after a complete review of operating conditions and other compressor components can these be determined.