Cast Iron Balancing Double Regulating Valves

MMA Cast Iron Balancing Double Regulating Valves


Application


The manual balancing valve STV(E) is optimized for use in heating- and cooling systems.


Sizing


STV(E) are sized with nomogram, handwheel or online Applications on smartphones.


STV(E) shall be dimensioned at 50-80 % of maximum flow for the design flow.


Minimum recommended differential pressure is 2 kPa (0,29 psi)


Setting


The hand wheel has digital reading which shows whole turns and tenth of a turn.


The setting is shown in table format or can be calculated by using software on the website.


Any setting can be locked to avoid tampering with the setting of the balancing value.


On STV DN 65-150 an Allen key of 6 mm is used on the inner spindle to lock the setting.


On STV(E) DN 200-300 the key is enclosed.


When the setting is locked the valve cannot be opened to a larger value but it can be closed for maintenance of the connected circuit.


Measuring


The pressure test ports are opened by unscrewing the lids.


Differential pressure can be measured using a balancing instrument.


Mounting


Mounting direction is clearly shown with an arrow on STV(E)


The flanged on STV(E) is according to EN 1092-2.


CE


Correspond to PED 2014/68/EU


Pressure compensated valve


STV DN 80-150 has a pressure compensated valve for easy adjustment of the pre-setting