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
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.
Secondary seals and elastomers are resistant to water, demineralized water and hydraulic oil.
Recommended applications
- Chemical industry
- Petrochemical industry
- Oil and gas industry
- Refining technology
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.
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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