What fluids are compatible with the SALAMI 3PB hydraulic gear pump, type P38P2, given its NBR seals and viscosity range of 12â800 cSt (recommended 17â65 cSt)?

SALAMI 3PB hydraulic gear pump, type P38P2 with NBR (nitrile) seals and viscosity range 12â800 cSt (recommended 17â65 cSt) is compatible with a wide range of mineralâbased hydraulic oils and many other fluids that do not attack NBR. Typical compatible fluids: - Mineral hydraulic oils (HLP/HVLP) . most common, recommended viscosity 17â65 cSt for best efficiency and life. - Antiâwear and zincâbased hydraulic oils. - Phosphate ester fluids (some types) . only if the specific ester is certified compatible with NBR (check supplier data). - Glycolâbased (waterâglycol) fluids . compatible in many cases but verify NBR compatibility and additive package. - Synthetic hydrocarbons (PAO, PAG compatibility varies) . PAOs generally compatible; verify with manufacturer for specific PAGs. - Light machine oils and turbine oils within the viscosity range. - Some biodegradable esters and vegetableâbased hydraulic oils . only when explicitly rated NBRâcompatible. Fluids to avoid or verify carefully: - Strong polar solvents, ketones, chlorinated hydrocarbons, aromatic hydrocarbons, concentrated acids/alkalis . these degrade NBR. - Some phosphate esters and synthetic fluids not rated for NBR. - Fluids outside the viscosity limits (800 cSt may overload pump; optimal 17â65 cSt). Always confirm fluid compatibility with the pump and seal manufacturer and check additive packages, temperature operating range, and contamination control.

Can the SALAMI 3PB hydraulic gear pump, type P38P2, operate with biodegradable or synthetic hydraulic fluids within its NBR seal and viscosity limits?

Yes - the SALAMI 3PB hydraulic gear pump, type P38P2, can operate with biodegradable or synthetic hydraulic fluids provided two conditions are met: the fluid is compatible with NBR (nitrile) seals, and its kinematic viscosity falls within the pumpâs acceptable range (12â800 cSt), ideally within the recommended 17â65 cSt. Before switching, verify the chosen biodegradable/synthetic fluidâs compatibility with NBR (some esters or aggressive additives can swell or degrade NBR) and ensure viscosity at operating temperature meets the pumpâs recommended range to maintain performance and longevity. If compatibility is uncertain, consult the fluid supplier or perform seal compatibility testing.

Are there temperature limits for the SALAMI 3PB hydraulic gear pump, type P38P2 affecting fluid viscosity and sealing?

Yes. The SALAMI 3PB hydraulic gear pump, type P38P2, has practical temperature-related limits because temperature affects fluid viscosity and the performance of its NBR seals. Key points: - Viscosity range specified: 12â800 cSt (recommended 17â65 cSt). Fluid temperature must therefore be such that the oil stays within this viscosity window; too low temperature raises viscosity above limits, increasing friction, torque and wear; too high temperature lowers viscosity, reducing film thickness, increasing internal leakage and reducing volumetric efficiency. - NBR (nitrile) sealing: NBR has typical operating temperature limits roughly â30 Â°C to +100 Â°C (serviceable range often narrower under pressure/aging). Exposure above ~100 Â°C accelerates hardening, embrittlement and loss of sealing performance; very low temperatures can cause hardening and leakage. Exact limits depend on compound and service conditions. - Materials: Aluminum housing and cast-iron rear cover have broad temperature tolerances, but thermal expansion can affect clearances when fluid temperature varies widely. Practical guidance: - Keep fluid viscosity within the recommended 17â65 cSt for best efficiency and seal life; avoid operation where viscosity falls below 12 cSt or exceeds 800 cSt. - Avoid sustained fluid temperatures exceeding typical NBR limits (â100 Â°C) and avoid very low temperatures that make NBR brittle (below ââ20 to â30 Â°C), unless seals are verified for such extremes. - For extremes of temperature, consider selecting suitable fluid (viscosity grade) and/or alternative seal materials compatible with the expected temperature range.

SALAMI 3PB hydraulic gear pump, type P38P2

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Additional information

Maximum operating temperature [°C]	85
Minimum operating temperature [°C]	-20

Gear displacement pump (hydraulic), type P38P2, with external gearing, intended for use in hydraulic systems of machines and equipment. Material: housing and mounting plate – aluminum, rear cover – cast iron. Sealing: NBR. Liquid viscosity: from 12 cSt to 800 cSt (recommended from 17 to 65).

List of product variants

Article number	Product variant name	DN	BAR	Availability	Price	Quantity	Actions	Catalogue
SA-3PB46D-P38P2	Hydraulic pump 3PB46D-P38P2	-	245	In stock	0 zł		Enquiry
SA-3PB55D-P38P2	Hydraulic pump 3PB55D-P38P2	-	220	In stock	0 zł		Enquiry

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Gear displacement pump (hydraulic), type P38P2, with external gearing, intended for use in hydraulic systems of machines and equipment. Material: housing and mounting plate – aluminum, rear cover – cast iron. Sealing: NBR. Liquid viscosity: from 12 cSt to 800 cSt (recommended from 17 to 65).