Product Name: 2017 Freesea Commerical Swimming Pool Water Treatment Sand Filter Model NO.: FCC-1800 Certification: CE, GS, RoHS, CB, LFGB, UR, EMF, EMC, SASO, CSA Performance: Efficient Filtration Style: Vertical Motive Force: Pressure Usage: Environmental Protection, Chemical Industry, Swimming Pool Type: Ozone Water Purifier Test-Pressure: 4kg(400kpa/58psi/4.0bar) Max-Presssure: 2.5kg (250kpa/36psi/2.5bar) Quartz Size: 0.5~0.8mm Sand Size: 1~2mm Max-Temperature: 50 Celsius Material: 100% Fiber Glass Thickness: 6mm Customized: Yes MPV: No Butterfly Valve: No Trademark: FREESEA Transport Package: Paper Carton Specification: 1.08 Origin: Ningbo HS Code: 8421219990 Product Description 2017 FREESEA commerical swimming pool water treatment sand filterNew spiral cover system which aids the operations of opening andclosing.The air purge is built into the coverwhich can be efficient torelease the air from the filter.The distance between the upper part of the sand layer and thediffuser head("freeboard")has been increased toensure greaterdistribution of water in the filtration phase and avoid sand beingspilt into the drain during backwash.The specially designed manhole in the sand filter can make the sandexchanging process more convenient andefficient.In the filteringprocess,the filtering effect of water can be observed through theperspective manhole whichis designed in the sand filter.Equipped with manual exhaust valve and exhaust pipe, which canautomatically discharge the gas in running anddebugging.Commercial sand filter is used in larger size installations,such ascommercial and communal swimmingpool,aquatic park,aquariumsand other place where need water treatment.