SPN Automatic

SPN Automatic

SPN Automatic

Features

The SPN is an automatic refill unit for barrier fluid pressurization in seal circuits. Pressurization by pneumatic or electric power, or a combination of both. The refill unit tank is designed for pressureless operation and is equipped with a level switch and a sight-glass. The refill unit has all pipework as far as the distributor unit. Separate components are installed in the seal circuit to cool and to circulate the barrier medium.

Advantages

  • Reliable mode of operation: should the pump be switched off, the barrier fluid pressure will be maintained for a limited time by an integrated accumulator
  • Membrane accumulator acts as a pulsation damper / barrier fluid storage tank
  • SPN3000: maintains constant barrier pressure irrespective of hysteresis-induced pressure fluctuations of the pressure switch

Operating range

The SPN range is available in 2 basic versions:
SPN1000: Vessel capacity 20 or 40 liters
SPN3000: Vessel capacity 40, 60 or 200 liters

Barrier fluid pressure regulation for the SPN1000 via pressure switch to the pump control.
The SPN3000 is equipped with a pressure regulator for maintaining a constant barrier pressure level.

Materials

Parts in contact with the medium are made of stainless steel.
Secondary seals and elastomers are resistant to water, demineralized water and hydraulic oil.

Functional description

SPN automatic refill units differ from an SPA in that they perform just two of the four basic functions of a barrier fluid system, namely barrier fluid pressurization and leakage compensation. It is possible to use a piston pump with either electric or pneumatic power for pressurization of the barrier medium. Should all the pumps fail, the pressure will be maintained in the refill unit for a limited time to ensure that pressurization of the barrier fluid circuit is maintained. How long the pressure is maintained will depend on the storage volume and the leakage losses to be compensated.



Product variants

Designation Barrier fluid
pressure
adjustable
from … to
Mas.
Flow
rate
(l/h)
Vessel
volume
(liters)
Number
of
pumps
Type of drive Nominal
output
(kW)
Max air rate
(Nm³/h)
Approx.
overall
dimensions in
cm
H x W x D
Net
weight
(approx.)
SPN1020/E002 0.5 ... 20 bar
(7.25 ... 290 PSI)
10 20 1 E 0.18 - 69 x 37 x 36 40 kg
(88 lb)
SPN1020/L002 5 ... 20 bar
(73 ... 290 PSI)
60 20 1 L - 26 58 x 37 x 36 30 kg
(66 lb)
SPN1063/E002 5 ... 63 bar
(73 ... 914 PSI)
10 20 1 E 0.18 - 69 x 37 x 36 40 kg
(88 lbs)
SPN1063/L002 20 .. 63 bar
(290 ... 914 PSI)
60 20 1 L - 26 58 x 37 x 36 30 kg
(66 lb)
SPN1063/E004 5 ... 63 bar
(73 ... 914 PSI)
10 40 1 E 0.18 - 69 x 69 x 36 50 kg
(110 lb)
SPN1063/L004 20 ... 63 bar
(290 ... 914 PSI)
60 40 1 L - 26 58 x 69 x 36 40 kg
(88 lb)
SPN1063/EE04 5 ... 63 bar
(73 ... 914 PSI)
20 40 2 E 2 x 0,18 - 69 x 69 x 36 60 kg
(132 lb)
SPN1063/LL04 20 ... 63 bar
(290 ... 914 PSI)
120 40 2 L - 52 58 x 69 x 36 50 kg
(110 lb)
SPN1063/EL04 20 ... 63 bar
(290 .. 914 PSI)
70 40 2 EL 0.18 26 69 x 69 x 36 60 kg
(132 lb)
SPN3035/E004 4 ... 35 bar
(58 ... 508 PSI)
10 40 1 E 0.18 - 69 x 69 x 36 70 kg
(154 lb)
SPN3035/L004 4 ... 35 bar
(58 ... 508 PSI)
60 40 1 L - 30 58 x 69 x 36 60 kg
(132 lb)
SPN3035EL06 4 ... 35 bar
(58 ... 508 PSI)
70 60 2 EL 0.18 30 69 x 100 x 37 80 kg
(176 lb)
SPN3035/EE06 4 ... 35 bar
(58 ... 508 PSI)
20 60 2 EE 2 x 0.18 - 69 x 100 x 37 80 kg
(176 lb)
SPN3035/LL06 4 ... 35 bar
(58 ... 508 PSI)
120 60 2 LL - 60 58 x 100 x 37 70 kg
(154 lb)
SPN3063/E020 0 ... 63 bar
(0 ... 914 PSI)
130 200 1 E 1.1 - 110 x 175 x 100 120 kg
(265 lb)
SPN3063/L020 0 ... 63 bar
(0 ... 914 PSI)
300 200 1 L - 175 100 x 130 x 70 300 kg
(661 lb)
SPN3063/EL20 0 ... 63 bar
(0 ... 914 PSI)
430 200 2 EL 1.1 175 110 x 175 x 100 450 kg
(992 lb)
SPN3063/EE20 0 ... 63 bar
(0 ... 914 PSI)
260 200 2 EE 2 x 1.1 - 110 x 175 x 100 500 kg
(1,102 lb)
SPN3063/LL20 0 ... 63 bar
(0 ... 914 PSI)
600 200 2 LL - 350 100 x 130 x 170 400 kg
(882 lb)
SPN3120/E020 0 ... 120 bar
(0 ... 1,740 PSI)
130 200 1 E 2.5 - 110 x 175 x 100 450 kg
(992 lb)
SPN3120/L020 0 ... 120 bar
(0 ... 1,740 PSI)
300 200 1 L - 175 100 x 130 x 70 300 kg
(661 lb)
SPN3120/EL20 0 ... 120 bar
(0 ... 1,740 PSI)
430 200 2 EL 2.5 175 110 x 175 x 100 480 kg
(1,058 lb)
SPN3120/EE20 0 ... 120 bar
(0 ... 1,740 PSI)
260 200 2 EE 2 x 2.5 - 110 x 175 x 100 500 kg
(1,102 lb)
SPN3120/LL20 0 ... 120 bar
(0 ... 1,740 PSI)
600 200 2 L - 350 100 x 130 x 70 400 kg
(882 lb)

Other versions on request.

General features:
All connecting threads G1/2"
Type of protection: Ex e II T3


Other variants
The SPN automatic refill unit can be supplied with a wide range of system components and engineered systems to meet specific customer requirements.
Example: SPN060-E002-D1.

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