Chalwyn "TMZ" values - additional models.

March 2008. 

Diesel engine air intake shut down valves in the popular Chalwyn “TMZ” range are all now available without an integral flametrap housing.  This enables a more compact installation for applications not requiring a flametrap or where the flametrap is already positioned elsewhere in the intake system.   Full details are given in Chalwyn publication CE209 - see “Technical Brochure Downloads”.  



Expansion to range of Chalwyn diesel engine automatic intake shut down values.

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.

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.

These new valves are all also available with the addition of manual shut down control. 



High Output Addition to the range of Chalwyn flameproof alternators

September 2007

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.


Update to Chalwyn mini range automatic shut down values

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The D30B and D30BS air intake automatic over speed engine shut down valves have been superseded by new Chalwyn valve types D29 and D30.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The D29 and D30 are about 30% shorter in length and about 20% smaller on body diameter than the superseded models.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].           

Full details of the D29 and D30 range can be found on this web site under "Technical brochure downloads" – brochure code CE209.


Diesel engine alternators for Group I appications

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.  



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, such as TMZ air intake shut down valves and 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.

TSZ Exhaust
Temperature
Value



New diesel engine automatic fuel shut down valve from Chalwyn

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.

LST-200



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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