SZL type series assembly pipe steam/hot water boiler is double drum pipe chain grate ... Rated steam pressure: 0.7Mpa, 1.25Mpa, 1.6MpaOperating Principle : SZL type series assembly pipe steam/hot water boiler is double ... back way design, adopt reasonable injected circulation for hot water boilers, medium speed in back way of heat surface ... always looking forward to your visit! steam/hot water boiler