Norgren VS18 Series Valve Advantage - Manual (Page 11)

VS18/VS26 MAINTENANCE & INSTRUCTION BOOKLET
4.3.2 Flow
The flow values are measured at 6 bar inlet pressure and with a pressure drop of 1 bar.
Glandless valves VS**G VS18 VS26
QN
(L/min) Kv
(m
3 /h)
Cv (US
Gal/min) QN
(L/min) Kv
(m
3 /h)
Cv (US
Gal/min)
5/2 Sol/Spring 550 0.48 0.56 1‘000 0.87 1.02
5/2 Sol/Sol 550 0.48 0.56 1‘000 0.87 1.02
5/2 Sol (priority side 14)/Sol 550 0.48 0.56 1‘000 0.87 1.02
5/3 APB Sol/Sol 550 0.48 0.56 1‘000 0.87 1.02
5/3 COE Sol/Sol 550 0.48 0.56 1‘000 0.87 1.02
Softseal valves VS**S VS18 VS26
QN
(L/min) Kv
(m
3 /h)
Cv (US
Gal/min) QN
(L/min) Kv
(m
3 /h)
Cv (US
Gal/min)
2x2/2 NC Sol/Sol 550 0.46 0.56 1’150 1.00 1.17
2x2/2 NO Sol/Sol 550 0.46 0.56 1’150 1.00 1.17
2x2/2 NO/NC Sol/Sol 550 0.46 0.56 1’150 1.00 1.17
2x3/2 NC Sol/Sol 600 0.52 0.61 1‘250 1.09 1.27
2x3/2 NO Sol/Sol 600 0.52 0.61 1‘250 1.09 1.27
2x3/2 NO/NC Sol/Sol 600 0.52 0.61 1‘250 1.09 1.27
5/2 Sol/Spring 650 0.57 0.66 1‘350 1.18 1.37
5/2 Sol/Sol 650 0.57 0.66 1‘350 1.18 1.37
5/3 APB Sol/Sol 650 0.57 0.66 1‘350 1.18 1.37
5/3 COE Sol/Sol 650 0.57 0.66 1‘350 1.18 1.37
APB = All ports blocked
COE = Centre open exhaust
NC = Normally closed
NO = Normally open
4.3.3 Maximum cycling rate
In practice the cycling rate should be lower than 300 c.p.m. (<5 Hz). The valves should be
switched above 90% (working port) and below 10% (exhausting port) of the supply pressure.
4.3.4 Minimum impulse on bistable valves
The minimum impulse length on 5/2 way bistable valves should correspond at least twice to the
response time (see section
4.3.1 ).
4.3.5 Important information for 2x2/2 valves
All 2x2/2 functions (NC, NO or NO/NC) have port 1 not connected in neither end position to port
2 or 4. Port 1 is not necessary (except internal pilot air). Supply of compressed air or vacuum
must be feeded to port 3 or 5.
Pay attention to this when configuring the valve island (blanking off canals 3 and 5 in base) !!
VS2672926-KG00E_05/07 Page 11/97