Datasheet summary
Speck NP25 L
PDF datasheet mirror for Speck NP25 L (Speck Pumps). Verify with OEM before design.
Summary
Product Identification
The Speck NP25 Series consists of high-pressure triplex plunger pumps.
Available models:
- NP25/21-300
- NP25/25-250
- NP25/30-200
- NP25/38-180
- NP25/41-170
- NP25/50-150
Operating Limits
- Maximum Water Temperature: 70 °C
- Maximum RPM: 1450 min⁻¹
- Operation Type: Data provided is for intermittent operation. Data for continuous operation is available on request.
- Safety Valve: A safety valve must be installed in accordance with guidelines for liquid spraying units, set so that the admissible operating pressure cannot be exceeded by more than 10%. Operating without a safety valve, or exceeding temperature or speed limits, automatically voids the warranty.
- Cavitation: Particular care must be taken when pumping warm water, making absolutely sure that cavitation cannot occur.
Performance Data (Intermittent Operation)
| Type | Code No. | Power Consump. (kW) | Pressure max (bar) | RPM max (min⁻¹) | Output max (l/min) | Plunger dia. (mm) | Stroke (mm) | Weight approx. (kg) | NPSH Required (mWs) |
|---|---|---|---|---|---|---|---|---|---|
| NP25/21-300* | 00.6155 | 12.3 | 300* | 1450 | 20.8 | 18 | 20 | 17.4 | 8.7 |
| NP25/25-250 | 00.6154 | 12.4 | 250 | 1450 | 25.0 | 18 | 24 | 17.4 | 9.3 |
| NP25/30-200 | 00.6153 | 12.2 | 200 | 1450 | 31.1 | 22 | 20 | 17.4 | 6.4 |
| NP25/38-180 | 00.6152 | 13.2 | 180 | 1450 | 37.3 | 22 | 24 | 17.4 | 6.8 |
| NP25/41-170 | 00.6151 | 13.5 | 170 | 1450 | 40.4 | 25 | 20 | 17.4 | 8.0 |
| NP25/50-150 | 00.6150 | 14.3 | 150 | 1450 | 48.4 | 25 | 24 | 17.4 | 9.3 |
* For interval operation up to max. 350 bar.
Intermediate values for output/speed and pressure/output/kW can be established by linear extrapolation.
A general formula for calculating power is: P (bar) x Q (l/min) = kW / 475
Feed Water
SPECK TRIPLEX Plunger Pumps are suitable for pumping:
- Clean water
- Other non-aggressive or abrasive media with a specific weight similar to water.
Prior to pumping any other media, a check must be made to find out whether these pumps, taking pump performance and temperature values into consideration, are suitable for pumping the required medium.
Mechanical / Hydraulic
Construction Characteristics
- Crankcase of solid aluminium-cast.
- Crankshaft and taper roller bearings together with plain bearing con rod all run in oil.
- Solid ceramic plunger.
- Double plunger sealing with leakage-return.
- All gaskets in seal sleeves ensuring precise centring and easy replacement.
- Identical suction and discharge valves, easily accessible.
- Even though SPECK-TRIPLEX NP25 pumps run almost pulsation-free, there are cases where a pressure accumulator is necessary. This depends mainly on the construction of the unit and the conditions under which it is operated. The same effect can also be achieved by using flexible pressure lines.
Materials Used
- Valve Casing: Special Brass
- Plunger: Ceramic
- Valves: High-Grade Stainless Steel
- Sleeves: Nitrile with fabric reinforcing
- Support Rings: Teflon with graphite, run-dry-proof
- Crankshaft: Drop-forged and case-hardened
Special Versions
- All models of the NP25 series are available in AISI 316TI stainless steel under the supplement letters ‘RE’.
- The NP25/21, /25, /30, and NP25/50 models are also available with bronze valve casings and stainless steel wetted parts under the supplement letter 'S'.
- Special seals are available upon request.
Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the original OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used for the project.
Official datasheet (PDF)
Curated from selected public technical reference material for discovery and preliminary comparison. This summary is not a substitute for a current certified manufacturer datasheet. Verify revisions and design limits before use.