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Modular balanced pressure mixing valve with ceramic valve elements

  • US 3,921,659 A
  • Filed: 12/19/1973
  • Issued: 11/25/1975
  • Est. Priority Date: 12/19/1973
  • Status: Expired due to Term
First Claim
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1. A balanced pressure mixing valve comprising a lower valve body with inlet and outlet openings therein, a mating upper valve bonnet with a valve stem extending therethrough capable of rotational movement with respect to the bonnet, a modular pressure balancing cartridge having hot and cold inlet ports in the bottom of the cartridge with sealing means therein for sealing engagement with the inlet openings in said valve body, hot and cold outlet ports in the top of the cartridge with sealing means therein, the cartridge having no sealing means on the sides thereof to facilitate placement in the valve body, diaphragmatic balanced pressure means in the cartridge separating flow of hot and cold water therethrough, ceramic valve seats positioned in the outlet ports of the cartridge, a ceramic regulator disk in sealing, sliding engagement with the ceramic valve seats with openIngs therethrough and operable by the stem through a limited angle of rotation to bring the disk openings into and out of registry with the ceramic valve seats, said rotational movement controlling both temperature and volume of water flowing through the mixing valve.

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