HOERBIGER Safety Solutions Explosion Protection System Components Overview These suppressors are used for explosion suppression of gases, solvent vapours and combustible dusts. The suppressors deliver high rates of suppressant that quench an explosion flame in its early stages, thus preventing a pressure rise from reaching dangerous proportions. Description A cylindrical alloy steel container filled with 3kg, 4kg or 16kg of powder suppressant and pressurised to 60 bar (880 psi) with dry nitrogen. Inside the flange is a hinged flap supported by a beam which is kept closed by a latch. Two piston, nonexplosive protractor operated actuators are used to initiate opening. Each suppressor is subject to a full function test as part of the strict and robust quality procedures. The suppressor is supported by either a flanged elbow or mounting stub. Within the mounting stub is a spreader designed to give the optimum distribution pattern of suppressant. A silicone rubber blow-off cup is fitted over the spreader to prevent ingress of material from the protected plant. Operation When the actuators are actuated by means of an electrical impulse from the associated control unit, pistons move the latch, which allows the flap to open. The nitrogen then expels the suppressant at high rate through the spreader assembly into the protected volume. IEP Technologies engineers are available to undertake periodic inspection and maintenance. The recommended time interval between inspections is three months, or 2000 plant operating hours. 4kg or 16kg PHRD Suppressor Vertically Approvals Mounted on The suppressors are designed to comply with future ATEX Fixed Spreader-directives. Zone 1 approval, EExdIIc T6 is also available. 417-1 South Street, Marlborough, MA, 01752 ph 855.793.8407 fax 508.485.3115 www.IEPTechnologies.com

HOERBIGER Safety Solutions This suppressor contains no explosive devices. Electrical Data Actuator Fuse Resistance Between 0.9 and 1.6 ohms Options: EExd IICT6 version available upon request Contact Information For additional information, please contact of the following locations: IEP Technologies - United Kingdom Unit 1, Neptune Business Centre Tewkesbury Road Cheltenham, GL51 9FB Tel: +44 (0) 1242 283 060 417-1 South Street, Marlborough, MA, 01752 ph 855.793.8407 fax 508.485.3115 www.IEPTechnologies.com