What the 25057-1 Pump Is
The 25057-1 is the Bijur Delimon Economy Manual Grease Pump. It is a hand-operated piston pump for fluid greases with a 1 L reservoir, roughly 1 kg or 2 lb of grease. The 25057-1 designation appears on the nameplate for exact replacement matching.
Each stroke delivers 1.0 cc into a lubricant circuit. This site lists the pump for replacement use where the documented fit matches an existing Bijur Delimon circuit.
Official Specifications
- Output: 1.0 cc per stroke
- Maximum pressure: 150 bar (2175 psi)
- Grease grades: NLGI 000, 00, and 0 only
- Outlet: 1/8 in NPT female
- Reservoir: 1 L
- Built-in relief valve and follower plate
- Fill through a zerk fitting or bulk fill
- Regional variant: verify a 25057-V suffix letter on the nameplate
These ratings come from the Bijur Delimon documented specification for the 25057-1.
Fluid Grease Limits
The pump is specified for fluid grease only. Grease grades NLGI 000, 00, and 0 are acceptable; standard stiff grease is outside the specification and is the key limit.
The follower plate and relief valve support fluid-grease movement. Do not use this pump where a stiff grease is required by the circuit. The pump will not perform as designed outside the fluid grease range.
Documented Applications: FL Injectors
Bijur Delimon documentation lists this pump for FL-32, FL-33, FL-42, and FL-43 injector circuits. These are single-line injector style circuits within a central lubrication system.
The pump is not documented for progressive divider systems. Confirm circuit compatibility before using it to feed a divider. Always compare the circuit type with the pump documentation before installation.
Versus the 25058-2 and the Oil Pump
The 25058-2 hand grease pump is a different unit with an M8 outlet and 15 MPa (150 bar) class rating for SLR/PDI service. These two pumps are not drop-in substitutes. Check the outlet thread and service rating before substituting one pump for the other.
The manual oil pump covers the oil-side equivalent. Choose by lubricant type and downstream circuit.
Service and Filling
Fill through a zerk fitting or by bulk fill, and keep the follower plate seated on the grease surface. For replacements, contact the quotation team with the nameplate suffix.
The smaller sibling is the 25018-2 with a 0.4 L reservoir. Use it only where the lower reservoir volume matches the circuit demand. The nameplate suffix confirms the regional build; record it when requesting a quote.
Frequently Asked Questions
What grease grades does the 25057-1 pump accept?
It accepts NLGI 000, 00, and 0 fluid greases only for use in its 1 L reservoir. Standard stiff grease is outside the specification and will not move correctly through the outlet.
Can this pump handle standard stiff grease?
No, standard stiff grease is outside the documented specification, so the pump cannot develop proper delivery. This pump is built only for fluid greases in NLGI 000, 00, and 0 grades.
What is the output per stroke?
The output is 1.0 cc per stroke for every hand cycle, giving a fixed delivery rate. This fixed delivery supports single-line injector circuits without any manual adjustment or additional setting.
What outlet thread is used?
The outlet is a 1/8 in NPT female connection, which matches standard Bijur Delimon circuit fittings. Confirm the mating fitting before installation on an existing circuit to avoid a thread mismatch.
Is this pump suitable for progressive divider systems?
The pump is not documented for progressive divider systems, so it must not be assumed compatible there. Confirm circuit compatibility before using it to feed a divider, because a mismatch affects delivery.
What is the documented injector circuit range?
Bijur Delimon documentation lists FL-32, FL-33, FL-42, and FL-43 injector circuits as the documented application range. These are single-line injector style circuits, so they use one path per injector point.
How is the reservoir filled?
Fill through a zerk fitting or by bulk fill, depending on the available grease supply method. The follower plate and relief valve support consistent fluid-grease movement after each fill cycle.
What is the maximum pressure rating?
The maximum pressure is 150 bar, equal to 2175 psi, which matches the documented Bijur Delimon rating. The built-in relief valve helps protect the circuit at that limit and prevents excessive pressure rise.
Does a regional variant exist?
The 25057-V regional variant exists for some markets, and the suffix letter identifies the regional build. Verify the suffix letter on the nameplate before ordering a replacement unit.
Who builds and supports this pump?
IsoHiTech Lubrication Systems, founded in 2023, engineering since 2006, builds and supports every unit. Email inquiry@isohitech.com for specifications and a quotation.
To order a replacement, contact the quotation team. Bijur Delimon is a trademark of its respective owner. This is an aftermarket manual pump, not manufactured, sponsored, or endorsed by Bijur Delimon. 25057-1, 25058-2, and 25018-2 are Bijur Delimon designations shown for cross-reference identification only.
