Soft sealing gate 20.900/21.900 series soft sealing valve body is made of ductile iron, in strict accordance with the relevant product quality standards, in line with EN ISO 9001 standards and comply with 97/23/CE PED standards, 20.900 Series meets DM 174 (97/83/CE standard). Product description: 20.900/21.900 series soft sealing valve body is made of ductile iron, in strict accordance with the relevant product quality standards, in line with EN ISO 9001 standards and comply with 97/23/CE PED standards, 20.900 Series meets DM 174 (97/83/CE standard). According to the structure can be divided into short-long structure length and long length of two kinds of structures. Scope: Can be used for sewage treatment systems. Does not apply to steam system, not for regulating traffic. Diameter: DN40-350