Andritz has received an order from Holmen Paper, a part of the Holmen Group, Sweden, to refurbish and install dewatering equipment for a new TMP (thermo-mechanical pulp) washing stage at PM 12 in Hallstavik. Basic engineering, erection as well as commissioning and start-up, which is scheduled for the final quarter of 2018, are also part of the delivery scope.
The company will refurbish two used Andritz twin wire presses and relocate an existing pulp screw press. After re-installation as the TMP washing stage, the dewatering equipment will improve the pulp quality, thus ensuring higher product quality on the paper machine. PM12 manufactures book paper and newsprint grades.
Scope of Supply
- Refurbishment of two used Andritz twin wire presses.
- Relocation and overhaul of an existing pulp screw press used in the former deinking plant at Hallsta paper mill.
- Installation of a new conveyor for pulp dilution and shredding after washing.
- Rebuild and relocation of two existing screw conveyors.
Adaptable and user-friendly
The independent refrigeration and air conditioning specialist Bitzer has expanded its range of condensing units to include a new series. The seven air cooled Ecolite models have been designed for low and medium temperature applications and are available in an attractive housing.
The three Ecolite LHL3E condensing units with one fan and the four LHL5E models with two fans open up a wide range of applications, from 1.5 kW to 5 kW in the low temperature refrigeration range and from 3.5 kW to 16 kW in the medium temperature range. All seven models in the new series have been designed as standard for a wide range of both low and medium temperature applications – for example, in cold stores, display counters and small shops. Their compact, low sound design and the use of efficient components in combination with the capacity control of the semi-hermetic compressors make them exceptionally adaptable.
Flexible and compact
Thanks to the Varistep mechanical capacity control, all Ecolite condensing units offer stepless capacity adjustment in a range from 50 to 100 per cent. The LHL5E models enable flexible capacity control between 10 and 100 per cent as an optional feature. Ecolite has also been specially developed for low sound operation and features a robust and corrosion-resistant housing for outdoor use. Thanks to their compact construction, the condensing units can also be easily integrated even when space is limited. Another advantage of the series is the low refrigerant charge required thanks to efficient mini-channel condensers with a high heat transfer rate. The company has also integrated proprietary components optimised for the system as well as its Ecolite reciprocating compressors into the Ecolite series.
Future-proof and sustainable
Ecolite condensing units are easy to use, have control software developed by Bitzer and work very reliably thanks to the well-known development and production work at Bitzer. Users benefit from the fact that all components are precisely matched to one another. The entire series is Ecodesign-compliant and has been designed for use with common refrigerants, including those with a low global warming potential such as HFO blends. The extensive equipment and plug-and-play concept make installing and commissioning the condensing units very quick and easy.
Intuitive and convenient
All the components of the Ecolite condensing units are easily accessible, whilst its controller offers intuitive operation and enables use of the Bitzer Electronics Service Tool (BEST). BEST assures a user-friendly overview of parameters and the operating status and also offers support via a data logging function and the convenient setting of parameters. And with their optional accessories, the Ecolite condensing units show their practical side too: for example, a second capacity control for the LHL5E models, an oil separator with check valve and a temperature sensor for operation based on room temperature are available.
Larger valve sizes and higher pressure ratings
Energy-efficient Valve for Cryogenic Applications
The new Type 3598 Cryogenic Valve was specially developed to meet the requirements of cryogenic applications. The valve is available in sizes up to NPS 8 and pressure ratings up to Class 900 and is suitable for temperatures down to –196 °C. The valve is optimized to handle high pressure drops. It has a cryogenic extension bonnet and circulation inhibitor that ensure a perfect temperature distribution and minimize energy loss to the atmosphere. The top-entry design facilitates work on the valve: the valve can be serviced without having to remove the enclosure or insulation it is installed in. The valve seat, piston and circulation inhibitor can be accessed directly after removing the actuator.
Lower actuator thrusts and smaller actuator sizes can be used thanks to the standard pressure balancing by a piston. This allows customers to save money on initial investment and reduce the cost of installation and servicing over the actuator’s life cycle. Possible fields of applications for Samson’s high-pressure cryogenic valve include air separation units (ASU) and marine applications, for example to store and transport cryogenic gases on LNG carriers.
With the Type 3598 Cryogenic Valve, the company is responding to the customers’ growing demand for increasingly larger units. Further additions to the modular design, e.g. larger valve sizes and higher pressure ratings, are being planned.
Over the past 112 years, the firm has been driving forward new developments and introducing market innovations. Today, Samson is a worldwide leader in the manufacture of expertly engineered control valves and accessories for all industrial processes.
The ideal connection
In the manufacture of metal bellows couplings, bellows and hub connections are a critical issue. While steel or stainless steel couplings can be combined with a special micro plasma welding process, this method is not suitable for combinations of aluminum and steel. Adhesive bonding processes can be used here, but they can fail under extreme operating conditions (chemicals, very high or low temperatures). Especially in the case of clutches on the input side of a planetary gear, high temperatures can occur in critical applications which could loosen the adhesive bonds.
The developed and long-time patented joining process (crimping-in-press process), on the other hand, is optimally suited for connecting multi-layer stainless steel bellows without clearance to aluminum hubs. Here the operation is certainly possible even in temperature ranges from -50 ° C to + 350 ° C.