Hydromodul Altimetric Control Valve
The valve shall be made according to these specifications:
- high hydrodinamics section globe body, without stagnation pockets (low pressure loss type);
- standard ductile cast iron casting GS400/GGG40, carbon steel casting on request;
- 200°C furnace polyester powder paiting with 150 micron of minimum guaranteed thickness;
- plunger shaft entirely guided;
- particular plunger disc section and seat against cavitation risk;
- plunger shaft guide independent of seal seat;
- removible standard stainless steel seat, for higher cavitation resistance;
- obstacle free full port;
- neither spoke nor gride interposed in closing passage section to reduce maintenance and possible clogging;
- optional V-Port plunger or dissipating cage without valve modification, to dissipate higher pressure and stabilize the valve opening.
- stainless steel exagonal head bolts fastening cover to main valve body; bolts protected inside casting;
- silicone bolt sealing on request;
- stainless steel shaft, plunger and return spring;
- return spring must not be inside flow path to avoid further turbulences and clogging;
- stainless steel brass plunger position indicator;
- nylon reinforced Buna-N diaphragm, on request special material diaphragm for petrolchemical use;
- Polyurethane plunger seal disc, or special material for petrolchemical use, on request;
- easy maintenance design and easy access to internal parts without removing the valve from the pipeline;
- possible maintenance intervention on pilot circuit even with operating valve;
- drain plug on valve bottom for total drainage in case of frost;
- main function pressure gauge for pilot calibration included, optional pressure gauge on demand;
- lifting and handling rings obtained directly from casting;
- valve functions can be changed or added by simple pilot circuit modification.
STANDARDS CONFORMITY
- Flange to flange: UNI-EN 558-1, DIN 3202 serie F1.
- Flange drilling: ISO PN16-25-40, on request compatible ANSI 150-300.
- Conform to use with water intended for human consumption as DM174/GU166/DE98/83CE