DESMI Proven Technology 1

DESMI Proven Technology 3

DESMI Proven Technology 2

DESMI Proven Technology 4

DESMI Proven Technology 5

Cases


The reliable solution for unsaturated Polyester Resin

The reliable solution for unsaturated Polyester Resin

The pumping of polyester resin has always caused problems because of the material properties of this liquid. In December 1996 Rotan Pumpengesellschaft GmbH became involved in the solution of a pumping problem at the end-user of an OEM. A big competitor from the USA had delivered pumps which did not turn out satisfactorily in terms of leakage.

The expensive breakdowns and operational downtimes were no longer acceptable. The OEM, who had committed himself to supply his customer with a functional and reliable installation, asked Rotan Pumpengesellschaft for help.

Pumps installed up till now:  
12 CD 81 ERFT 3U22PAL Keil/Tetradur/bayr.Yacht
2 CD126 ERFT 3U22PAL Keil/Tetradur/bayr.Yacht
7 HD/PD 126 ERFT1U22PAL Keil/Lorentz
6 CD81 ERFT 3U22PA Bayrakly/Turkey
3 CD101EFT 3U22PAL Bayrakly/Turkey

The problem involved in pumping unsaturated resin was well-known to us. Among other things the temperature of the medium must be kept below 50°C in order to avoid coagulation. Thus it is necessary to limit the friction at the shaft seal to a minimum. Moreover, a continuous flow of the product over the shaft seal should be ensured in order to remove the heat which is inevitably generated. If a pump with a large volume and a  maximum of 150 RPM was selected, internal friction in the pump would also be reduced to a minimum.

Solution
ROTAN® Pumpengesellschaft GmbH built a test pump by means of standard parts from the CD + HD/PD pump ranges with stuffing box plus 2 special, machined parts as well as 2 special shaft seal rings and a ground rotor shaft coated with tungsten carbide at the shaft seal area. The pump was equipped with a short suction pipe from the seal housing to the suction side of the valve.

This pump, named CD81ERFT, code 3U22PAL, No. 268285, has been in intermittent duty for approx. 3-4 hours a day since the beginning of February 1997, 136 RPM x 5 bar x approx. 4000 cSt, without leakage.

Result
Since the beginning of February 1997, 30 pumps of this special “PAL” design (deduced from Palatal BASF) have been delivered and put into operation.

Fields of application:  Suppliers of accessories to the car industry, electrical industry, plastic industry, yacht and boat builders, wherever laminated plastic and the like are produced or used as structural member.

Related cases


To the top

Join DESMI at ISH China & CIHE 2020, 11-13 May

ISH China & CIHE – China is an International Trade Fair for Heating, Ventilation, Air-Conditioning, Sanitation & Home Comfort Systems taking place May 11-13 2020 in Beijing, China at the New China International Exhibition Center

I’m interested. Tell me more

Join DESMI at Maritime Industry Gorinchem, 13-15 October 2020

The Maritime Industry exhibition is taking place May 13-15 October 2020 in Gorinchem, Netherlands at the Evenementenhal Gorincham

I’m interested. Tell me more

Join DESMI at the Irish Skipper Expo, 4-5 September 2020

The Irish Skipper Expo is taking place September 4-5 2020 in Limerick, Ireland at the UL Sport Arena

I’m interested. Tell me more

Join DESMi at AquaCulture UK 2020, 18-20 May 2021

Aquaculture UK is the most important aquaculture exhibition and conference held in the British Isles taking place 18-20 May 2021 in Aviemore, Scotland at the Macdonald Aviemore Resort

I’m interested. Tell me more

Join DESMI at CHEMUK 2020, May 13-14

The UK's chemical industries supply chain expo is taking place September 16-17 2020 in Stretford, United Kingdom at the Eventcity Limited

I’m interested. Tell me more

Join DESMI at Asia Pacific Maritime, 30 Sept. - 02 Oct. 2020

Asia Pacific Maritime (APM) is a premier exhibition and conference in Asia showcasing a complete overview of the many vessel sectors taking place March 18-20 in Singapore at the Marina Bay Sands

I’m interested. Tell me more

Join DESMI at Euronaval 2020, 20-23 October

The world naval defense exhibition taking place October 20-23 2020 in Paris, France at Paris Le Bourget Exhibition Centre

I’m interested. Tell me more

Join DESMI at Posidonia 2020, 26-30 October

The International Shipping Exhibition taking place October 26-30 in Athens, Greece at the Metropolitan Expo

I’m interested. Tell me more

Join DESMI at Sea Trade Maritime 2020, 7-9 December

Find DESMI at stand no G31, at the largest maritime event and conference in the Middle East taking place December 7-9 2020 in Dubai at the New Dubai Exhibition Centre.

I’m interested. Tell me more

We use cookies to enhance our website and improve your experience of it. If you say no to cookies, our website will still function, but it may result in diminished functionality.

OK