A sliding vane, positive displacement pump is provided which includes a dual mechanical seal that protects against leakage from a pump chamber while also reducing slip across rotor end faces. The dual mechanical seal may be formed as a cartridge seal that is readily demountable from the pump for replacement and service, and is retrofittable to existing pumps to improve the performance thereof. The pump may integrally include a dual mechanical seal, or the mechanical seal assembly may be provided for use by itself or in combination with a replaceable head ring that can be installed on existing pumps for repair thereof or for a retrofit upgrade of such existing pump.
申请公布号
WO2015161158(A1)
申请公布日期
2015.10.22
申请号
WO2015US26308
申请日期
2015.04.17
申请人
DELAWARE CAPITAL FORMATION, INC.,;WALTERS, MICHAEL, DOUGLAS;MITCHELL, MICHAEL, THOMAS
发明人
WALTERS, MICHAEL, DOUGLAS;MITCHELL, MICHAEL, THOMAS