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New diesel engine safety brochure available on-line
February 2010
The newest Chalwyn Diesel Engine Safety Solutions brochure is available for on-line viewing or downloading.
Preventing potential ignition disasters from engines on any type of plant where combustible gas, vapours or dust may exist, the wide range of products featured includes air intake and fuel shutdown valves, overspeed protection, shutdown control systems, flameproof alternators and exhaust spark arrestors.
Flameproof diesel engine air shutoff for Group 1 hazardous areas
October 2009
A new flameproof Chalwyn SVX electrically operated air intake shutdown valve has been introduced by AMOT to provide failsafe diesel engine safety in underground mining or similar applications calling for Group 1 certification. This energised-to-run unit has a non-sparking zinc alloy body and solenoid cover that has passed the required safety tests.
This failsafe valve helps to prevent potential explosions from diesel engine ignition on any type of mine or plant wherever there is a combustible gas, vapour or dust hazard.
Chalwyn SVX butterfly valves are offered in a wide range of models and can be flange or hose mounted with a combination of body sizes and hose adaptors to suit engine air intake diameters from 38 to 203mm (1½-8in).
Chalwyn welcomes new international distributors
May 2009
We are pleased to announce that Chalwyn Diesel Engine Safety products are now available through two new channel partners. For Mexico the Wilbur Eagle Company will add Chalwyn to their AMOT representation. For Trinidad and Tobago, the Rosco Petrovance Company will be supporting the local safety requirements of both offshore oil platforms and local refineries. For full details of these and other international distributors, please see distributors.
Chalwyn has moved to Suffolk UK
April 2009
Following the recent acquisition by AMOT, the manufacturing of Chalwyn products has been transferred to a larger facility at Bury St Edmunds. Also all administration and customer service support is now at this location. For details and map please see contact us.
Chalwyn valves specified at South Hook LNG Terminal
December 2008
Milford Haven in South Wales has recently become an LNG (liquefied natural gas) import receiving terminal. The safety managers at the new South Hook project specified the fitment of Chalwyn D valves and spark arrestors on all their maintenance vehicles and diesel driven equipment operating within the perimeter. The LNG is produced in the Middle Eastern country of Qatar, where the production facilities of Qatar also specify the D valves as an essential safety upgrade for all types of diesel engines operating there.
FSX-200 supersedes FSX-100
October 2008
The fuel cut off valve FSX-100 will be phased out and replaced with a revised version called FSX-200. The new valve incorporates a magnetic internal latch design and is easier to reset manually by the pull action knob on top of the valve. All connections points are identical with the FSX-100 allowing easy installation. Full details of the latest range of fuel shut off valves can be seen in the website technical downloads pdf CE226. |
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FSX-200
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High Output Addition to the range of Chalwyn flameproof alternators
September 2008
A new model, the ASX-400, has been added to the range of flameproof alternators available from Chalwyn.
Designed to enable it to be fitted in the place of standard automotive style engine mounted alternator, the ASX-400 is certified Exd and meets ATEX requirements for Zone 1, Group IIb, T4 hazardous area application.
In addition to an increased output of 24 volts / 50 amperes compared to the existing range of Chalwyn alternators, the ASX-400 is also designed to be suitable for multi-groove pulleys and has an adjustable mounting arrangement to assist fitting.
Full details can be seen in publication CE242.
 Expansion to range of Chalwyn diesel engine automatic intake shut down valves.
February 2008
A new valve, the D41, has been added to the “mini-range” of Chalwyn automatic over speed shut down valves. Suitable for diesel engines rated up to 27kW [36hp], the D41 is designed for a range of applications where the much larger D40 valve would previously have been specified. It is therefore particularly advantageous where space restrictions apply.
For full specifications see Chalwyn publication CE209.
 Also recently introduced, the D45-F3L and D51-F4L automatic intake shut down valves have been specially developed for direct mounting to the intake manifold of specific applications powered by Deutz 1011 and 2011 engines. Again these valves have particular advantage where space is restricted.
Full details are given in Chalwyn publication CE246.
These new valves are all also available with the addition of manual shut down control.
Update to Chalwyn mini range automatic shut down valves
August 2007
The D30B and D30BS air intake automatic over speed engine shut down valves have been superseded by new Chalwyn valve types D29 and D30. Major advantages of the new models include:
[a]. Reduced Size.
The D29 and D30 are about 30% shorter in length and about 20% smaller on body diameter than the superseded models.
[b]. Extended Tube End Size Range.
The new valves are available to suit any hose bore from 25mm. [1 inch] to 45mm. [1 3/4 inches] to suit diesel engines up to 24hp.
Full details are available in Chalwyn publication CE209.
Diesel engine alternators for Group I applications
July 2007
ATEX compliant Group I versions of the well established battery excited and self excited Chalwyn ASX-200, ASX-300 and ASX-310 Group IIB EExd alternators are now available for underground mining applications. The equivalent part codes for these new Group 1 products are ASX-220, ASX-320 and ASX-330 respectively. Rated outputs are the same as the equivalent Group IIB variants.
For details on the ASX-220 & ASX-320 please see CE244.
The self excited version ASX-330 is shown in CE245.
Chalwyn release new range of temperature valves
March 2007
Following extensive development and testing, Chalwyn have extended their range of diesel engine safety products with the release of a new range of temperature valves.
Chalwyn temperature valves are designed for incorporation into engine oil pressure or air pressure operated diesel engine automatic engine shut down systems and are suitable for zone 1 / zone 2 hazardous area applications.
These valves when used in combination with other current Chalwyn products. FSX fuel shut off valves allow a complete system to be built up to give automatic engine shut down on engine over speed [run away], high exhaust temperature, high coolant temperature or low oil pressure as well as a direct manual emergency shut down. Simpler systems, such as fuel shut off on high coolant temperature, can also easily be engineered. No electrical connections are involved.
Where certified hazardous area electrically operated automatic engine shut down systems are specified, the established Chalwyn Series 110, 111 and 210 products continue to be available.
New diesel engine automatic fuel shut down valve from Chalwyn
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February 2006
The long serving Chalwyn LUBE STOP valve was recently superseded by a completely new product. Like its predecessor this new valve, the LST-200, automatically stops the diesel fuel supply to an engine immediately on detection of loss of engine oil pressure, thereby avoiding potentially expensive downtime and repairs.
The new LST-200 now also features a simple manual control to latch the valve open following an emergency shut down should fuel system bleeding be required. Once the engine is running this manual latch is automatically released to regain full engine protection.
Chalwyn will also shortly be releasing a range of mechanical temperature valves. These can be used for example in conjunction with the LST-200 to extend its operation to automatically shut down fuel on high coolant temperature as well as on low oil pressure. |
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LST-200
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New Chalwyn electronic diesel engine safety system
May 2004
By combining a number of well-proven products with modern Control Units, Chalwyn have launched a new range of electronically controlled safety shut down systems for diesel engines. These are specifically designed for engines operating in hazardous areas or other critical situations where emergency automatic shut down of the engine air intake is part of the required specification.
In operation, these new systems shut down the engine by automatically closing both the intake air and fuel valves on detection of low engine oil pressure, high temperatures or engine overspeed. Additionally some variants will respond to an input shut down signal from a gas detection or other external system. Manual emergency shut down of the air intake valve is also included.
An outstanding feature of this new product range is the ease of setting the engine overspeed trip value with no special skills or knowledge required. This is a simple push button operation carried out with the equipment fully installed on the engine and no calculations / knowledge related to pulley sizes / drive ratios is required. For security, this push button is designed to be tamper proof when trip speed setting or checking is not in progress.
All hazardous area versions are certified in accordance with the ATEX Directive for Zone 1, Group IIB, T4 applications and are suitable for engines meeting the requirements of EN1843-1:2000. Lower cost and more compact uncertified versions are also available where added engine safety is required for non hazardous area applications.
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