sihi lpg solutions e 072011

150.22400.53.01 E 07/2011 SMH All Rights Reserved – SIHI Group BVFor further address details please visit: www.sterlingSIHI.com

Pumping Technology For A Better Future

LPG Solutions

EUROPESterling Fluid Systems (Austria) WienTel. +43 (0) 1 680 [email protected]

Sterling Fluid Systems (Belgium)Groot-BijgaardenTel. +32 (0) 2 481 [email protected]

Sterling SIHI (Bulgaria)Sofia-llindenTel. +359 (0) 2 [email protected]

Sterling Fluid Systems (Czech Rep.) OlomoucTel. +420 587 433 [email protected]

Sterling Fluid Systems (France)TrappesTel. +33 (0) 1 34 823 [email protected]

Sterling SIHI (Germany)ItzehoeTel. +49 (0) 4821 771 [email protected]

Sterling Fluid Systems (Hungary)VeszpremTel. +36 (0) 88 406 [email protected]

Sterling Fluid Systems (Italy)Monza, MilanTel. +39 039 282 [email protected] Sterling Fluid Systems (Netherlands) BeverwijkTel. +31 (0) 251 263 [email protected]

Sterling Fluid Systems (Poland)WarszawaTel. +48 (0) 22 335 2480/[email protected]

Sterling Fluid Systems (Romania)BucurestiTel. +40 (0) 21 610 [email protected]

Sterling Fluid Systems (Spain)MadridTel. +34 91 709 [email protected]

Sterling Fluid Systems (Schweiz)SchaffhausenTel. +41 (0) 52 644 [email protected]

Sterling Fluid Systems (UK)Altrincham, CheshireTel. +44 (0)161 928 [email protected]

ASIASIHI Pumps (Singapore)International Business ParkTel. +65 65 62 83 [email protected]

SIHI Pumps SDN BHD (Malaysia) Selangor Darul EhsanTel. +60 3 8942 [email protected]

SIHI Pumps (China) ShanghaiTel. +86 21 621 [email protected]

SIHI Pumps & Services Ltd (Thailand) BangkokTel. +66 38 079 [email protected]

SIHI Pumps (Taiwan) TaipeiTel. +886 2 2808 [email protected]

SIHI Pumps (Korea) SeoulTel.: +82 2 553 [email protected]

AMERICASSIHI Pumps Limited (Canada)Guelph OntarioTel. +1 519 824 [email protected]

SIHI Pumps Inc. (USA)Grand Island, New YorkTel. +1 716 773 [email protected]

SIHI Ltda. (Chile) Quilicura, SantiagoTel. +56 2 756 [email protected]

SIHI do Brazil (Brazil)CampinasTel.: +55 19 3773 [email protected]

SIHI Pumps (Colombia) BogotaTel.: +57 1 364 92 [email protected]

SIHI (Peru) LimaTel.: +51 1 421 [email protected]

Pumping Technology For A Better Future

Efficient LPG pumps and systems

Vertical tank pumpsSide channel pumps

Suction-lift (underground storage)

Flooded Suction (above ground storage)

Flooded suctionMultistage pumps with a special set oflow NPSH centrifugal impellers, inte-grated with a single gas handling and priming stage, are used for high-flow applications. With flooded suction, these units are typically used for tanker (off)loading, transfer, and bulk storage. The UEA series incorporates a priming stage (integral side channel stage) which prevents vapour locking and facilitates self-priming of the pump.Series: UEA.

Side channel pumps with a special low NPSH centrifugal impeller stage have self-priming characteristics in which to accommodate entrained with ease. Series CEH is often used for LPG bottle filling and other pro-cessing needs. The SC series has been specifically designed for use in AutoGas arenas. Series: CEH, SC.

Installations for suction lift operationThese systems consist of a side channel pump with a special low NPSH centrifugal impeller stage, monitoring and regulation control, and are used for suction lift con-ditions with a maximum lift of 4 m from underground storage tanks up to 200 m3 Series: PC.

Vertical tank pumpsBooster pumps installed in a chamber at the top of the underground storage tank with a maximum 6 m diameter. Series: CEB.

SIHI pumps and installations for liquefied gas-ses that comply with the highest demands

Not only do Liquefied gases vary in terms of their industrial and domestic uses, but also the way in which they are produced. Liquefied Gasses, as defined by DIN51622, include media such as propane, butane, and their derivates. However, liquefied gasses also include others such as carbon-dioxide, ammonia, and other refrigerant-based components.

Storage, transportation, and pumping of such Liquefied Gasses present the key success factors to handling this media. It is vital that the difference between this set of fluids, when compared to conventional media, is fully understood when specifying equipment. In simple terms, an explosive liquid being pumped at its boiling point needs to be handled with greater care than a less complex liquid far away from its vapour pressure.

Regarding the pumping equipment, there is a set of criteria that the user or specifier ought to consider as fundamental to the long-term trouble-free operation and ownership. Primarily, the most crucial point pivots around the vapour pressure of the liquefied gas.

Basically, the differentiating points that are essential to a liquefied gas pump, when compared with others, include: + Low NPSH (required)+ High pressure generation+ Steep pressure-to-flow curve characteristics+ Gas handling+ Mixed phase pumping without a significant reduction in flow capacity+ ATEX rated for those which are explosive

Primed for performance

Multi-stage pumps

Pumping Technology For A Better Future02 03

Performance range of LPG pumps


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CEB PC

Flooded Suction (above ground storage)

Suction-lift (underground storage)

SC UEA CEH

LPG distribution scheme

During the various stages of distribution, pumps are required to transfer LPG in order to compensate for the pressure losses in the flow process. Under normal atmospheric conditions, liquified gases would be gaseous. Depending on the temperature at certain pressures, they can be liquefied.

While liquified gasses have unique fluid characteristics, they are best pumped with equipment that is designed specifically for their application. Conventionally, such liquified gasses require a flooded suction in which to give adequate NPSH, and therefore avoid problems. However, suction-lift applications from underground storage is possible by employing the SIHI design of PC-unit.

Op

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+ Condition monitoring SIHIdetect

+ Variable speed drive+ Seal-less magnetically driven+ Mechanical sealing

+ High end sealant systems+ Dry running & cavitation protection+ Distributed Control System (DCS)+ …

Rail tanker Road tanker Distributionpoint

AutoGas dispenser

= Pump

Bulk storage tank

Industrial fuel depot

Consumer

ProducerOil burners,

Filling stations etc.

Bottling

Undergroundstorage tank

Side channel pumps with flooded suction operation


CEHThe most common design of combination pump is of horizontal construction with ring-section multi-stages constructed with an inline axial suction branch for reduced entry losses. An oversized centrifugal impeller is mounted immediately downstream of a flow-harmonising, extended suction branch. Essentially, the flow-harmonising suction branch, together with oversized centrifugal impeller, gives the low NPSH requirement while extending the hydraulic efficiency.

The latter, downstream side-channel stage(s) give the vapour, gas, and mixed flow capability along with a high discharge pressure. Moreover, the side-channel design is inherently a self-priming design.

Compared with other types of pump technology, the Side-channel Combination pump offers the user incredibly low suction inlet conditions. NPSH requirements of only 0.15m can be seen from some pump ranges for flow-rates up to 35 m3/hr.

Primarily, this results in a simplified installation where costs are optimised. The need to excavate the pump foundation, or increase the vessel height is removed. While the side channel stages are oriented in-line with the initial centrifugal stage, this construction ensures that flow is not interrupted or reduced with partial vapori-sation.

SC SIHI SC pumps have the same features and benefits as the CEH pumps. These pumps are specially designed for auto gas stations. The SC pumps are very reliable and quiet.

Principle of combination side channel multi-stage pumps

Combination side channel pumps combine very low NPSH with highly effec-tive gas, vapour, liquid, and mixed flow pumping. Side channel pumps can tolerate 50% entrained vapour, on a continuous basis, with ease. Highly ro-bust, by design, they have the ability to give decades of trouble-free service. They are also blessed with a very straight performance curve, which lends itself to pumping liquefied gasses.

A combination side channel pump consists of a flow-harmonising and low NPSH centrifugal first stage (1), an intermediate stage for stabilised NPSH, followed by the side channel stage. The side channel stage consists of an inlet suction cover (2), an exit discharge cover (3), and a vane-wheel type impeller (4) located between them.

Fluid is induced into the pump via the special low NPSH centrifugal impeller, and then enters the side-channel stage through its suction port (5). Liquid, gas, and/or vapour is drawn into the side-channel stage because of its posi-tive suction operation created by (a residual amount) fluid being regenerated around the „side channel“ - which has a reducing volume (6). At the end of the circumferential side channel, any gas is compressed through the gas-exit port (8) by this residual liquid because the side channel volume is getting smaller. Liquid volume in excess of a residual amount passes through the discharge port (7) and into the next stage. During 100% liquid pumping, and no gas or vapour, then liquid also passes through the gas-exit port (8).

Two basic types of combination side-channel pumps are available from SIHI – The combination side channel, and the combination multistage.(1) Combination side-channel pumps generally employ a single centrifugal impeller together with a multiple number of side-channel stages. The purpose is a relatively high pressure to flow rate, exceptional self-priming, and low NPSH. Series: CEH, PC, and CEB.(2) Combination multistage pumps have a high number of centrifugal impeller, and generally one side-channel stage. The purpose is a relatively high flow-rate, for bulk transfer, together with exceptional NPSH, and vapour handling.

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Technical dataOutput max. 35 m3/hDifferential pressure max. 20 bar Speed max. 3600 rpmTemperature -40°C to +120°CCasing pressure PN 40Shaft sealing single or double mechanical seal seal-less magnetic coupling

Drive+ Electrical motor+ PTO

Sealing+ Single or double mechanical seal+ Seal-less magnetic coupling

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CEHSC

Multistage pumps with flooded suction operation Vertical tank & side channel pumps for suction lift operation


UEAIn order to facilitate higher flow rates of liquefied gasses, in the region of 200 m3/hr, more multi-stage centrifugal stages can be added. When the balance of stages becomes weighted to a greater number of centrifugal-type impellers, this is known as a Centrifugal Combination Pump.

Centrifugal combination pumps continue to employ the benefits of the side-channel stage, which is mounted downstream of the other impellers towards the discharge.

Consequently, large flows can be pumped very efficiently with the added benefit of self-priming, and gas/vapour handling. This pump design features the same design of flow-harmonising axial inlet, and specially developed first (low) NPSH stage.

Technical dataOutput max. 35 m3/hDifferential pressure max. 20 bar Speed max. 3600 rpmTemperature -40°C to +80°CCasing pressure PN 40 / PN 25Shaft sealing single or double mechanical seal seal-less magnetic coupling

Technical dataOutput max. 220 m3/hDifferential pressure max. 23 bar Speed max. 3600 rpmTemperature -40°C to +80°CCasing pressure PN 40 / PN 25Shaft sealing single or double mechanical seal

CEBStorage tanks with diameters that, generally, do not exceed 6 m, can be fitted with vertical tank pumps that have an externally mounted motor. Quite obviously, these pumps are mounted on the top flange of the tank with the hydraulic end submerged within the liquid. The orientation is very similar to the Side-Channel combination pump mounted vertically. The flow-harmonising hydraulic suction and oversized centrifugal impeller is positioned nearest to the bottom of the inner tank by means of an extension tube. The benefit of this configuration centres upon the hydraulic being in a flooded suction condition.

PCThe advantage of this system lies in its simplicity. During priming, where NPSH is not readily available, the pump system has the capability to handle large quantities of vapour. Through vaporisation, heat is drawn from the liquid in the suction pipe.

The result is that the fluid in the suction line has a lower vapour pressure, due to its lower temperature, than that of the liquid remaining in the tank which is at a higher tempe-rature. Such a difference gives the suction fluid additional motive force in which to cause it to rise up and into the pump inlet. Full pumping capacity then commences.

During process operation, a small partial flow is re-circulated from pump discharge and returned to the upper vapour phase of the tank. Consequently, there is a higher pressure exerted on the liquid surface which facilitates a greater motive force of liquid up the suction line and into the pump. This approach provides a very stable, and extremely long term solution to underground storage vessels.

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PCCEB

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UEA


From concept to integration

SIHI Network

Client Terminals

Data Logging

Vibration & Condition Monitoring

Level Flow

Wireless

Thermal Control

PumpSequencing

SpeedControl

Duty/Standby

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Actuated ValvePump Motor Switch

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Operator Workstation

Permitting our customers to save precious time and money, SIHI offers a complete digital control system. Employing the Process Field-Bus standard communication platform, PROFI-BUS, simple

operator connectivity is possible via a SIHIcontrol. Available with local panel and screen, the pumping system has pre-programmed logic control, monito-ring, and data logging facilities.

Reduce Life Cycle Costs … T Capital Cost T Energy (Power) T Installation & Alignment T Maintenance & Operation T Down time T Environmental Cost

… with SIHI

Tota

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Your process partner Committed to engineering excellence

Understanding the process + 100 years of experience+ Staff trained to communicate at all levels+ Deep application knowledge

… Solutions with minimal customer effort

Optimum product range + Unique process can be treated with simplicity+ Reduced cost of design, manufacture, and documentation+ Predictable site testing and commissioning

… Customised solutions for standard capital costs

Design

+ Advanced design tools+ Highest level of machine efficiency+ Long lasting reliability

… Reduced energy, maintenance, and environmental costs

Manufacturing

+ Centre of excellence structure+ High level of skill and competence+ Ongoing people and process development

… Reduced integration costs

SIHIdetect – Condition based monitoring

Detect wear before damage occurs+ Cavitation and process turbulence+ Simple to connect+ LED display+ Available Ex+ All rotating machinery+ DCS integration and continual monitoring

Noise and Vibration analysis allows this com-pact device to diagnose the (often hidden)symptoms of longer term damage even before vibration occurs.

Tempe-raturePressure

EuropeGermany

AmericaGrand Island / New York

AsiaShanghai

Testing & documentation + Factory and Site Acceptance Tests+ Certified documentation+ Witnessed customised testing

… Reduced validation and commissioning costs

Quality assurance + Total Quality Management+ ISO9000+ Rigorous health and safety culture

… Long term security

Aftermarket – a local approach + Dedication to process uptime+ Locally positioned service & technical centres+ Easy access to support, on a worldwide level

… Highest level of customer care

Competence Centre + Centralised design, purchasing, production, compliance, and local support+ De-centralised (local) quotation and project management teams

sihi lpg solutions e 072011

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