Single membrane Biogas Balloon / Biogas holder material (special PVC Coated) is high voltage and fire resistant, resistant to damage by sharpened steel even when red-hot. The Biogas holder is installed in a special ventilated shed. The Biogas holder is designed to collect and store Biogas under pressure 0.005-0.01 Bar. Biogas supply to the Gas holder is done by means of special branch pipes made of НDPE. Biogas holders are equipped with a safety valve in order to avoid overpressure.