Danfoss H1 Technical Information

H1 pumps are limited in mechanical orificing combinations. Mechanical servo orifices are to be used only
for fail-safe return to neutral in the event of an electrical failure.
Typical response times shown below at the following conditions:
∆p
250 bar [3626 psi]
Viscosity and temperature
30 mm²/s [141 SUS] and 50 °C [122 °F]
Charge pressure
20 bar [290 psi]
Speed
1800 min
-1
(rpm)
Response time, MDC 069/078
Code
Orifice description (mm) Stroking direction (sec)
P A B
Tank (A+B) Neutral to full flow Full flow to neutral
C3
– – – – 0.4 0.5
C6
– – – 1 1.4 1.1
C7
– – – 1.3 0.9 0.8
C8
0.8 – – 0.6 4.2 3.1
C9
1 – – 0.6 3.9 2.9
D1
1 – – 0.8 2.5 1.9
D2
1.3 – – 0.8 2.2 1.7
D3
1.3 – – 1 1.6 1.2
D4
1.3 1.3 1.3 1 1.9 1.5
D5
0.6 0.8 0.8 0.6 7.5 4.4
D6
1.3 – – 1.3 1.9 1.5
Neutral Start Switch (NSS)
The Neutral Start Switch (NSS) contains an electrical switch that provides a signal of whether the control
is in neutral. The signal in neutral is Normally Closed (NC).
Neutral Start Switch schematic
P005 702
M14
M5
M4
M3
Neutral Start Switch data
Max. continuous current with switching
8.4 A
Max. continuous current without switching
20 A
Max. voltage
36 V
DC
Electrical protection class
IP67 / IP69K with mating connector
Technical Information H1 Axial Piston Single Pumps, Size 069/078
Control options
11062169 • Rev 0700 • November 2015 21

Danfoss H1 Specifications

General

Brand	Danfoss
Model	H1
Category	Water Pump
Language	English