Perko-Powermatic®

Frequently Asked Questions

Q: Do the opening forces comply with the requirements of Approved Document 'M'?

A: The maximum opening forces referred to within Approved Document 'M' are not exceeded by R100 Perko-Powermatic® on doors of a minimum width of 826mm, whilst still maintaining compliance with BS EN 1154.

Q: How efficient is Perko-Powermatic®?

A: Our closer has an "ultra" efficiency of 80%, which is a result of precision-engineered internal components. This exceeds the recommended efficiency of 65% ADM and 55% BS EN 1154.

Q: Will Perko-Powermatic® replace Perkomatic?

A: Definitely not! This is the third-generation in the family of Samuel Heath concealed door closers. It has been developed to meet the requirements of BS EN 1154 and takes Samuel Heath into a new market: controlled, concealed door closers with a CE Mark.

Q: Can you use Perko-Powermatic® on external doors?

A: Yes, but we would point out that the closer is a power size 3. The decision should be made on site as to whether this is sufficient given the prevailing conditions.

Q: Is intumescent required?

A: Yes. Our fitting instructions state that the closer and plates should be bedded in Alfacryl FR Intumescent Acrylic Mastic, which is available from Samuel Heath (see price list).

Q: What is the maximum weight of door it can be used on?

A: 80kg.

Q: What is the maximum width of door it can be used on?

A: 950mm.

Q: Can Perko-Powermatic® be used on double-action doors?

A: No. The geometry of a pivoting door differs from a hinged single-action door and is such that R100 would not function correctly.

Q: Can it open to 180 degrees?

A: No. We have tested to BS EN 1154 grade 3 category of use, which stipulates a maximum opening angle of 105 degrees.

Q: Does R100 have backcheck?

A: No. We recommend fitting a doorstop to prevent the links exceeding their maximum length of 52mm.

Q: Can you use Perko-Powermatic® with concealed hinges such as Soss or Simonswerk Tectus?

A: The pivot point of such hinges is generally not compatible with our closer.

Q: Can the closing speed adjuster screw fall out if completely unwound? This can happen with many standard overhead closers.

A: No. The adjuster screw is retained within the hydraulic unit and cannot work loose.