If there is anything you feel that has not been answered please contact us
How much will a one off cost and how long will it take?
Delivery on small quantities is normally 7-10 days including design. Cost is dependent upon the size of heater, but set up charges are minimal for wire wound heaters. Etch foil prototypes are available within 2-3 weeks and still only incur tooling charges of a few hundred pounds
What is the Difference between Foil and Wire?
Wire Wound element uses a round resistance wire and is ideally suited for small quantities and low cost sampling. It also lends itself to larger sizes to a maximum of 900mm x 3000mm not only can it be used in adhesive static applications but also where repeated flexing is required.
Etch Foil uses a chemically etched stainless steel track much like a printed circuit board suited to high power densities and medium to large quantities. Used mainly in static applications. Maximum size 600mm x 2500mm.
What is a Silicone Rubber Insulated Heating Element?
Comprising of a wire or etched resistor laminated between sheets of silicone rubber compound. These heaters are ideally suited for the heating of surfaces in a multitude of applications. Being of low thermal mass their heat transference is exceptional and being resistant to moisture they do not suffer moisture ingress associated with mineral insulated heating elements. Their thin lightweight construction and ease of installation make them a cost effective, reliable heating solution.
Do Holroyd produce heaters other than silicone?
Polyester and Polymide (Kapton) are used in a variety of applications. Contact our technical sales for further details.
What IP rating are the heaters manufactured to?
Holroyd can manufacture to IP65 and are currently working on achieving ratings as high as IP67. IP65 is the highest standard rating when using a moulded silicone cable termination.
How can I control the Temperature?
Heaters can be supplied with thermal limiting devices hard wired directly to the heater. Temperature sensors such as thermocouples, PT100’s and thermistors can be fitted to the heater mat for connection to external process controllers.
How are the heaters fixed?
For static applications a self-adhesive backing is a simple, quick method of installation. Where removal is requested hooks, eyelets and springs, Velcro and magnetic bindings are available.
What Quality system do Holroyd operate?
Holroyd have ISO 9001:2008 approval which is audited by British Standards Institution (BSI)
Do Holroyd have any third party approvals?
All our products meet all the relevant European directives and are CE marked accordingly. VDE approval as well as UL/CSA recognised products are available on request.
What power will I need and how long will it take to heat up?
Holroyd can provide detailed power calculations and offer advice for individual applications. Heat up times will depend on many variables such as ambient temp, mass & specific heat value of product and whether thermal insulation is utilised.
What voltage supply can I have?
The heaters are a pure resistor and therefore can be designed to suit any supply voltage, AC or DC, single or three phase.
Can I have a one off?
Of course you can. Holroyd are pleased to produce 1 off heaters be it for a problem solving application or prototypes for OEM (original equipment manufacturers) projects.
Can I cut the heater to size?
No, all the heaters are designed with a border between the edge of the heater and the resistor wire of approximately 5mm and therefore any cutting may damage the internal element.
What shapes can I have?
Practically any shape, size or profile is available along with holes, cut-outs and slots within the maximum sizes of 900mm x 3000mm for wire and 600mm x 2500mm for etch foil.
What is a high power density?
This is dependent on the application and type of control used. Please contact our technical sales team to discuss your application.
What temperatures can heater mats be used at?
Silicone rubber remains flexible from -60°c to 180°c. Specialist high temperature silicones are available for applications in excess of 230°c.