Description

These single seated valves are used for modulating control of hot / chilled water or steam in heating, ventilating and air conditioning systems. The valves can be operated by linear actuators ML6421B and M7L421B or by pneumatic actuators MP953. These three port mixing valves are used for modulating control of hot or chilled water in heating, ventilation and air conditioning systems and can be operated by electric linear actuators as ML6420/6425, ML7420/7425, M6421/7421 or by pneumatic actuators MP953 Description FEATURES · Cast iron body with flanged end connections · Low seat leakage rate · Metal to metal seating for long life span · Self adjusting packing · Accurate positioning to ensure state of the art temperature control · Easy mounting of direct coupled electric and pneumatic actuators · Constant total flow throughout full plug travel SPECIFICATIONS Action :Stem up to close port A-AB Nominal pressure rating : PN16 Flow characteristic :Equal percentage port A-AB, ngl = 3.4 linear port B-AB Rangeability : 50:1 Leakage rate : £0.1 % of kVS port A-AB £1 % of kVS port B-AB Stroke : 38 mm Valve body End connections : Flanged per ISO 7005-2 Material : Cast iron (GG25) Seat : Body integrated Stem : Stainless steel Plug : Stainless steel, skirt guided Packing : Spring loaded PTFE cone rings Medium temperature and pressure PN16 2 … 120 °C; 1600 kPa 120 … 150 °C; 1440 kPa Maximum temperature differential in alternating hot/cold water use : 60 K