NASH LIQUID RING COMPRESSORS FOR GAS APPLICATIONS IN REFINERY AND CPI PROCESS
FEATURES AND BENEFITS
The Nash design has the unique advantage of simplicity.
compressors are single stage. A single stage unit is a simpler
design with fewer parts, which means higher reliability and reduced
Bearings The design life of the bearings is more than 20 years for normal operating conditions and proper maintenance. Also the double lobe design
does not require thrust bearings:
to the balanced design of these pumps the developed axial load is
and radial loads. These bearings are designed to yield a B-10 life of 20 years. This far exceeds EEMUA, Section 2.9.2. Requirements.
The fully enclosed side-shrouded rotor of the conical design is inherently stiffer and thereby less prone to blade breakage. A disassembled view shows
the simple, rugged construction of a typical
HP compressor. Note the fully enclosed end shrouds on the
The centered rotor of the double lobe conical compressor has diametrically opposed porting with counteracting discharge pressure and forces eliminating
Gas compression Visualization action.
Schematic section at inlet Trace what happens in a single rotor chamber and discharge sectors, as it goes around a complete revolution.
The volumetric efficiency of the compressor is approximately 90%.
Flexibility and Tolerance of Changing Process Conditions The ability to tolerate changes in process flow (both liquid as well as gas) and maintain pressure and temperature control is enhanced by nash_elmo unique conical design.
Large, open inlet port passages in their cones enable the compressors to handle:
1. Liquid carryover from your system
2. Excess seal liquid rates optimising process vapour condensation and recovery.
1. Higher seal liquid rates, resulting in lower temperature operation.
2. Ability to handle liquid carryover or excess seal liquid flow resulting in better pressure control during upset condition.
3. Increased efficiency.
4. Easier and more accurate assembly.
Sealing Liquid Functions The operating liquid has three main functions, they are:
1. It removes the heat generated during compression.
2. It maintains the stability of the liquid ring.
3. It seals the axial clearance since the impeller rotates without any metal-to-metal contact.
Experience Nash has an extensive worldwide installation list. Customer testimonials reflect a proven track record on process application.
Service/Parts Backup Nash Technical and Distribution Centers throughout the world have trained Service staff and parts availability. Commissioning, start-up and service can be arranged from our local facility in Singapore.
Nashs only business is Engineered Vacuum and Compressed Gas System. We have to be the best at designing, engineering, packaging and servicing our product. Our commitment to excel in this endeavor is a total corporate effort by Nash employees worldwide.