The Sheffield head is specified by many standards covering respiratory protective devices for supporting a facepiece during testing and simulated breathing. The headforms are manufactured in a variety of materials but all have a concentric tube assembly securely fastened within the head for connection to an external breathing circuit, eg, breathing machine, blower or other type of air mover. The base of the headforms is flat, but angled, so that the head is leaning backwards. This is to prevent any moisture running forward into the facepiece being tested.
Technical Specification
Sheffield head
- Variant - 1SH
- Rigid mounted core covered with Services Required Size & weight polyurethane to simulate flesh/skin
- Services Required - Bench mounted
- Size & weight - 28 x 16 x 26 cm: 6.2kg
The headform is designed to operate in the conditions specified by the relevant standards listed below.
Storage conditions should be restricted to 5 to 35°C and <85%RH.
Relevant Standards
The headform is called up in the following standards, or the standards called up by them:
- AS/NZS 1716:2012
- EN 140:1998
- EN 1061:1997
- BS 8468-1:2006
- BS 8468-2:2020
- EN 136:1998
- EN 137:2006
- EN 138:1994
- EN 149:2001
- EN 269:1994
- EN 402:2003
- EN 403:2004
- EN 405:2001
- EN 1827:2009
- EN 12941:2008
- EN 12942:2008
- EN 13274-3:2001
- EN 13274-6:2002
- EN 13274-8:2002
- EN 13794:2002
- EN 14593-1:2018
- EN 14593-2:2005
- EN 14594:2018