The charging and gauging assembly consists of 3 mt. charging hose with standard nitrogen nipples, body incorporating gas valve connection, bleed valve and check valve. These kits are packed in a plastic storage case. Gauge is diameter 63 mm. diam. type pressure gauges with 0÷250 bar graduation. The following are recommended for use on all piston ac- cumulators (with standard filling valve type VM) and on all welded dia- phragm accumulators.
It is used for the periodic check of accumulator pre-charge and for the inflation of accumulators after the maintenance or it is used for the change of pre-charge value. For the inflation, it is necessary a connection to a bottle filled with industrial dry nitrogen with a pressure higher than the pre-charge value required, provided with pressure reducer (manda- tory, for safety reasons, during the inflation of accumulators with PS < 210 bar).
Furthermore, the use of a pressure reducer makes easier the slow and graduated inflow of nitrogen on the bladder, thus avoiding the possibility of damaging the bladder itself.
NOTE: These assemblies are not recommended for continuous monito- ring of gas pre-charge. For continuous monitoring, see Gas Adapters at Section 8.3
MAX OPERATING PRESSURE (PS): 400 BAR
PRESSURE TEST (PT): 1.43 x PS
SCALE OF PRESSURE GAUGE:
4 – 10 – 16 – 25 – 60 – 100 – 250 (std.) – 400 bar WORKING TEMPERATURE: – 20 ÷ +80°C
NITROGEN CONTAMINATION DEGREE:
class 20/18/15 according to ISO 4406/99
BODY MATERIAL: phosphated carbon steel or galvanized carbon steel in compliance with Directive 2002/95/EC (RoHS) to resist to corrosion
SEALS MATERIAL: P = Nitrile rubber (NBR) and Delrin
FILLING VALVE CONNECTION: M28x1.5 + adapters (upon request) WEIGHT: 1.8 Kg. (complete with case)