CASAPPA Replacements

CASAPPA Cast iron External Gear Pump KP30.34D

CASAPPA KP30.34D-83E3-LED/EB-N is a robust positive displacement cast iron gear pump designed to deliver high volumetric efficiency and stable fluid power under demanding industrial and mobile operating pressures.

| Applications of CASAPPA KP30.34D-83E3-LED/EB-N Hydraulic Gear Pump

This cast iron external gear pump is engineered for heavy-duty fluid transfer and hydraulic circuit pressurization across industrial manufacturing, agricultural machinery, and mobile hydraulic systems. It powers auxiliary functions, steering circuits, and drive mechanisms in equipment operating under continuous high loads and severe environmental conditions.

Key Technical Specifications

Product Model: CASAPPA KP30.34D-83E3-LED/EB-N

Brand Replacement: CASAPPA OEM or as requested.

Displacement: 34.56 cm³/rev

Rotation Direction: Clockwise (D), counter-clockwise (S)

Speed Range: Min. speed 350 r/min; Max. speed 3000 r/min

Peak Pressure: 290 bar

1. Overview of CASAPPA KP30.34D-83E3-LED/EB-N

CASAPPA KP30.34D-83E3-LED/EB-N is a KAPPA 30 external gear pump. Casappa builds the KAPPA range around a body and a mounting flange in cast iron of superior mechanical specification, and the KAPPA 30 is a solid, compact two-piece construction that allows several functions to be packed into a reduced space. Inside, the external gear pair runs on sleeve bearings between pressure-balanced thrust plates, so the assembly stays rigid and keeps its volumetric efficiency as pressure rises and as the unit wears. In the standard CSC body design the 34.56 cm³/rev gear set is rated 250 bar continuous, 270 bar system pressure and 290 bar peak, and turns between 350 and 3,000 r/min.

Its function in a circuit is to draw oil from the reservoir and convert drive-shaft rotation into pressurised flow. This unit carries the European E3 mounting flange, the European 1:8 tapered drive shaft (code 83) and European flanged four-bolt side ports — inlet ED (27 mm nominal), outlet EB (19 mm nominal). The same range can be ordered with European, SAE and ISO mounting flanges, nine drive-shaft options and threaded, split-flange or flanged ports, so one pump family covers a wide spread of existing installations.

2. Dimension of CASAPPA KP30.34D-83E3-LED/EB-N

Interface data needed with the drawing:

ItemValue
Mounting flangeEuropean E3 standard
Drive shaftEuropean tapered 1:8, shaft code 83 — mounting face E3 (not available for size 30•41)
Ports positionL — inlet and outlet on the side
Ports IN / OUTEuropean flanged 4-bolt — inlet ED (27 mm nominal), outlet EB (19 mm nominal)
Version0 — without outboard bearing
Mounting flange bolt tightening torque70 ±7 Nm (558 ÷ 682 lbf in)
Body clamp bolt tightening torque140 ±14 Nm (1,115 ÷ 1,363 lbf in)

3. Pump Installation Specifications CASAPPA KP30.34D-83E3-LED/EB-N

The Casappa KAPPA 30 ordering code is a 12-position string: each position selects one characteristic of the unit, and reading it is the fastest way to check that a pump will fit an existing installation. Positions 1 to 8 define the unit itself; positions 9 to 12 define the drain port, the shaft-seal option, the body design and the painting.

Code structure — official example: KP 30•27 R 0 - 04 S3 - L OF/OD - N - OA - C4 - CSC - VNR01

Pos.MeaningOptions in the KAPPA 30 range
1TypeKP 30•22 / •27 / •31 / •34 / •38 / •41 / •43 / •46 / •51 / •56 / •61 / •73
2RotationD clockwise / S anti-clockwise / R reversible, rear external drain / L reversible, side external drain / B reversible, internal drain
3Outboard bearing0 without outboard bearing / 1 with outboard bearing / 3 with outboard bearing / 6 with outboard bearing
4Drive shaft83 European tapered 1:8 / 04 SAE "B" spline 13 T / 32 SAE "B" straight / 05 SAE "BB" spline 15 T / 33 SAE "BB" straight / A8 SAE "B" spline for K9 flange / A5 SAE "BB" spline for K9 flange / 06 SAE "C" spline 14 T / A6 SAE "C" spline 14 T short type
5Mounting flangeE3 European / S1, S2, S9 SAE "A" 2 holes / S3 SAE "B" 2–4 holes / K9 SAE "B" 2 holes / S6 SAE "C" 4 holes / S8 SAE "C" 2 holes / Q3 SAE "C" 2 holes short type
6Ports positionL IN/OUT side / H IN side, OUT rear / K IN rear, OUT side / P IN/OUT rear
7Ports IN/OUTEuropean flanged ED/EB for KP 30•22 to •61, EF/ED for KP 30•73 · SAE flanged (SSM) MC/MB for 22–38, MD/MC for 41–51, ME/MD for 56–73 · SAE flanged (SSS) SC/SB for 22–38, SD/SC for 41–51, SE/SD for 56–73 · SAE straight thread (ODT) OF/OD for 22–38, OG/OF for 41–73 · GAS straight thread (BSPP) GF/GE for 22–38, GG/GF for 41–73
8SealsN Buna NBR (standard) / V Viton-FKM / T-PV HNBR seals with Viton-FKM shaft seals / N Bz Buna NBR with bronze thrust plates / V Bz Viton-FKM with bronze thrust plates
9Drain portno code GAS straight thread (BSPP, standard) / OA SAE straight thread (ODT)
10Shaft seal optionsno code standard seal / D shaft seal with wiper seal / C4 high-pressure special shaft seal
11Body designCSC Standard / HSC Compact (22–38) / BSC High performance (22–38–41–43–46)
12Paintingno code without painting (standard) / VNR01 black / VGR01 grey

Position 7 lists the port pair in IN/OUT order for pumps and in OUT/IN order for motors — which is why the same European flange appears as ED/EB on a pump and as EB/ED on a motor.

Reading your code: KP30.34D-83E3-LED/EB-N

PositionCodeMeaning
1KP 30•34Type: KAPPA 30 group 3 pump, 34.56 cm³/rev (2.11 in³/rev)
2DRotation: clockwise, looking at the drive shaft
3not writtenOutboard bearing: standard option — without outboard bearing
483Drive shaft: European tapered 1:8
5E3Mounting flange: European standard
6LPorts position: inlet and outlet on the side
7ED/EBPorts IN/OUT: European flanged 4-bolt — inlet ED, outlet EB
8NSeals: Buna NBR, standard
9 to 12not writtenDrain port GAS straight thread (BSPP) standard; standard shaft seal; CSC standard body design; no painting

The same unit is listed on the market as KP30.34D0-83E3-LED/EB-N (Casappa reference 03570000), i.e. with the position-3 digit 0 written out. Both strings describe the same pump.

| Techspecs of CASAPPA KP30.34D-83E3-LED/EB-N

| Performance

ParameterValue
TypeKP 30•34 — KAPPA 30 group 3 external gear pump
Displacement34.56 cm³/rev (2.11 in³/rev)
Continuous operating pressure p1250 bar (3,625 psi) — CSC / CSL Standard body design
System pressure p2 (relief valve setting)270 bar (3,915 psi) — CSC / CSL Standard body design
Peak pressure p3290 bar (4,205 psi) — CSC / CSL Standard body design
Compact body design, HSC / KSL210 / 230 / 250 bar (3,045 / 3,335 / 3,625 psi)
High performance body design, BSC / BSL280 / 300 / 320 bar (4,060 / 4,350 / 4,640 psi)
Reversible versionmax. pressures 250 bar (3,600 psi), except the sizes whose rated value is lower
Max. speed3,000 r/min
Min. speed350 r/min
Theoretical flow103.7 l/min at 3,000 r/min · 51.8 l/min at 1,500 r/min (displacement × speed ÷ 1,000)
Max. drain line pressure, single-rotation pump0.5 bar (7 psi)
Max. drain line pressure, reversible pump5 bar (73 psi)
Multiple-pump versionspressures must be limited by the transmissible torque of the drive and connecting shafts; special connecting shafts available up to 350 Nm (3,098 lbf in)
Efficiencycalculated from the catalogue design formulas Q = Qtheor. × ηv, M = Mtheor. ÷ ηhm, ηt = ηv × ηhm; performance curves are published for each displacement

| Interfaces and configuration

ParameterValue
RotationD — clockwise
Mounting flangeEuropean E3 standard
Drive shaftEuropean tapered 1:8 (shaft code 83), mounting face E3
Ports positionL — inlet and outlet on the side
Ports IN / OUTEuropean flanged 4-bolt — ED (27 mm nominal) / EB (19 mm nominal)
Version0 — without outboard bearing
SealsN — Buna NBR (standard)
ConstructionTwo-piece cast-iron construction: body and mounting flange in cast iron, external gear pair on sleeve bearings, pressure-balanced thrust plates
Mounting flange bolt tightening torque70 ±7 Nm (558 ÷ 682 lbf in)
Body clamp bolt tightening torque140 ±14 Nm (1,115 ÷ 1,363 lbf in)
Port bolt tightening torqueED — M10 thread, 15 mm deep: 20 +1 Nm (177 ÷ 186 lbf in), 30 +2.5 Nm (266 ÷ 288 lbf in) on the high-pressure side · EB — M8 thread, 15 mm deep: 15 +1 Nm (133 ÷ 142 lbf in)

| Operating conditions

ParameterValue
FluidMineral-oil-based hydraulic fluid to ISO/DIN; fire-resistant fluids on request (specify the fluid type when ordering)
Inlet pressure range (pump)0.7 ÷ 3 bar abs. (10 ÷ 44 psi); above 1.5 bar abs. (22 psi) a specific shaft sealing must be used
Viscosity — recommended12 to 100 mm²/s (cSt) [60 to 456 SSU]
Viscosity — permittedup to 750 mm²/s (cSt) [3,410 SSU]
Fluid temperature, N seals−25 °C to 80 °C continuous (−13 °F to 176 °F); 100 °C (212 °F) max. peak
Fluid temperature, V / T-PV seals−25 °C to 110 °C continuous (−13 °F to 230 °F); 125 °C (257 °F) max. peak
Cold startmin. inlet pressure 0.5 bar abs. (7 psi); outlet pressure ≤ 50 bar (725 psi); speed ≤ 1,500 r/min; max. oil viscosity 2,000 mm²/s (cSt) [9,100 SSU]; min. temperature −40 °C (−40 °F)
Recommended contaminationNAS 1638 class 10 / ISO 4406 21/19/16 at Δp < 140 bar; 10 μm filter element
Storagedry environment; max. 24 months under ideal conditions; ideal storage temperature 5 °C to 20 °C (41 °F to 68 °F)
Dimensionssee section 2.

| Advantages of CASAPPA KP30.34D-83E3-LED/EB-N

Cast-iron body and mounting flange. The KAPPA range is built around a body and a mounting flange in cast iron of superior mechanical specification, and the rigidity of that assembly is what holds reliability and high volumetric efficiency at high operating pressures.

High operating pressures. 250 bar continuous, 270 bar system pressure and 290 bar peak in the standard CSC body design; the same displacement is available with the Compact and High performance body designs when the installation calls for a different pressure/flow trade-off.

Solid, compact two-piece construction. The KAPPA 30 packs several functions into a reduced space, which matters where the pump has to fit inside an existing housing or a tight driveline envelope.

Low noise emission. The external gear design keeps running noise low, which is a requirement on fan drives, municipal machinery and equipment working close to the operator.

Exceptional working life expectancy. Pressure-balanced thrust plates compensate for wear, so the pump keeps its flow as the unit ages.

High efficiency at high temperature. As the circuit oil heats up and the film thins, the cast-iron structure limits the loss of volumetric efficiency — the property Casappa specifies the KAPPA range for.

Available with built-in valves. KAPPA pumps can be ordered with integrated valve functions, which removes external plumbing from the circuit.

European standard interface. The E3 flange and the 1:8 tapered drive shaft match the mounting and the coupling European mobile machinery is already built for, and the ED/EB four-bolt flanged ports take standard European flange fittings.

Wide combination choice. European, SAE and ISO mounting flanges, nine drive shafts, four port positions and threaded, split-flange or flanged ports let the same pump be matched to an existing driveline, mounting and pipework.

Suited where fluids and size are critical. KAPPA is the range Casappa positions for applications where noise, contamination, non-flammable fluids and envelope size are the deciding factors.

Reference — CASAPPA KP30.34D-83E3-LED/EB-N

The KP 30 range — same series, all displacements

Every size below is a valid position 1 in the KAPPA 30 pump ordering code. Pressures are the ratings for unidirectional pumps with side ports and the CSC / CSL Standard body design; reversible pumps are limited to a maximum of 250 bar, except the sizes whose rated value is lower.

Pump typeDisplacementp1p2p3Max. speedMin. speed
KP 30•2221.99 cm³/rev (1.34 in³/rev)270 bar290 bar310 bar3,000 r/min350 r/min
KP 30•2726.7 cm³/rev (1.63 in³/rev)270 bar290 bar310 bar3,000 r/min350 r/min
KP 30•3130.63 cm³/rev (1.87 in³/rev)250 bar270 bar290 bar3,000 r/min350 r/min
KP 30•3434.56 cm³/rev (2.11 in³/rev)250 bar270 bar290 bar3,000 r/min350 r/min
KP 30•3839.27 cm³/rev (2.40 in³/rev)250 bar270 bar290 bar3,000 r/min350 r/min
KP 30•4141.62 cm³/rev (2.54 in³/rev)250 bar270 bar290 bar3,000 r/min350 r/min
KP 30•4343.98 cm³/rev (2.68 in³/rev)230 bar250 bar270 bar3,000 r/min350 r/min
KP 30•4646.34 cm³/rev (2.83 in³/rev)210 bar230 bar250 bar3,000 r/min350 r/min
KP 30•5151.83 cm³/rev (3.16 in³/rev)210 bar230 bar250 bar2,500 r/min350 r/min
KP 30•5656.54 cm³/rev (3.45 in³/rev)190 bar210 bar230 bar2,500 r/min350 r/min
KP 30•6161.26 cm³/rev (3.74 in³/rev)180 bar200 bar220 bar2,500 r/min350 r/min
KP 30•7373.82 cm³/rev (4.50 in³/rev)170 bar190 bar210 bar2,500 r/min350 r/min

The matching gear-motor range is KM 30, with the same displacements — the two sizes are alternative position-1 entries of the same 12-position code.

Complete order numbers identified on the market

Complete KAPPA 30 pump order numbers for the KP 30 range, from KP 30•22 to KP 30•73. Reference only — each number is valid only in the exact configuration it describes.

  • KP30.27D0-83E3-LED/EB-N

  • KP30.27S0-83E3-LED/EB-N

  • KP30.27D0-83E3-LED/EB-N-BZ

  • KP30.27D0-83E3-LED/EB-N-CSC

  • KP30.27S0-A5K9-LED/GD/GE-W-N-L

  • KP30.34D0-83E3-LED/EB-N

  • KP30.34S0-83E3-LED/EB-N

  • KP30.34B0-83E3-LED/EB-N

  • KP30.34D0-04S5-LED/EB-N

  • KP30.34-A8K9-LOF/OD-45-HSC

  • KP30.38D0-83E3-LED/EB-N

  • KP30.38S0-83E3-LED/EB-N

  • KP30.38-05S6-LMF-00-M5-KSL-30

  • KP30.43D0-83E3-LED/EB-N

  • KP30.43S0-83E3-LED/EB-N

  • KP30.51D0-83E3-LED/EB-N

  • KP30.51S0-83E3-LED/EB-N

  • KP30.51D0-06S8-LME/OF-N-CSC

  • KP30.51-A8K9-LSF/OF-M5-CSL/30.4

  • KP30.56D0-83E3-LED/EB-N

  • KP30.56S0-83E3-LED/EB-N

  • KP30.56D0-04S3-LOG/OC/OA-N-P9

  • KP30.56S0-84E4-LED/ED-N

  • KP30.56S0-A8K9-POG/OF-N-CSC

  • KP30.61D0-83E3-LED/EB-N

  • KP30.61S0-83E3-LED/EB-N

  • KP30.61D0-84E4-LEF/ED-N

  • KP30.61D0-A8K9-POG/OF-N-CSC

  • KP30.73D0-83E3-LED/EB-N

  • KP30.73S0-83E3-LED/EB-N

Official Casappa order examples for multiple-pump assemblies, for reference:

  • KP 30•27 R 0 - 04 S3 - L OF/OD - N - OA - C4 - CSC - VNR01

  • KP30•51 - A8K9 - L MD/MC - - CSL

  • KP30•51-A8K9-LMD/MC-NSL

Brand Replacement

HENGYUHANG supplies a replacement for the CASAPPA KAPPA 30 gear pump series, including KP30.34D-83E3-LED/EB-N and the rest of the KP 30 size range from KP 30•22 to KP 30•73. The replacement is built to the same group 3 dimensional envelope and the same international standard interfaces — European, SAE and ISO mounting flanges, the same drive-shaft families, and threaded, split-flange or flanged ports — so a machine originally fitted with a Casappa KAPPA 30 pump can be returned to service without modifying the driveline, the mounting or the pipework.

Replacement units are supplied to Casappa's published interface and dimension data for the KAPPA 30 group. The ordering code of the original pump is the reference used to confirm fitment, so please quote the complete original order number when enquiring.

Applications

Typical applications of the KAPPA 30 gear pump family:

  • Building and construction — supply pump on compact machines, excavators and loaders, roller and drum drives, auxiliary circuits

  • Material handling — lifting, tilting and positioning circuits on handling equipment, cranes and aerial platforms

  • Forestry — feed, conveyor, saw and attachment drives on forestry machinery

  • Fan drive — engine cooling fan drives and hydraulic fan circuits

  • Agriculture — supply and implement circuits on tractors, balers, harvesters, sprayers and seeders

  • Industrial hydraulics — presses, mixers, machine tools and plastic injection moulding machines

  • Special vehicles — municipal vehicles, cleaning vehicles and truck-mounted equipment

In these machines the pump feeds loads that run continuously at moderate circuit pressure, and is expected to hold flow under sustained load, high duty cycles and demanding ambient conditions. The cast-iron body, the sleeve-bearing gear pair and the pressure-balanced thrust plates are what let the unit keep its volumetric efficiency as circuit pressure and oil temperature rise.

Package & Shipping

ItemSpecification
PackagingSingle unit, wooden box / export-grade packing
Selling unitSingle item — MOQ 1 unit
Net weightApprox. 13.6 kg for the KP 30•34 with the 83 E3 flange and side ports
Gross weight and package sizeConfirmed per order, according to the shaft, flange and ports selected
Lead timeConfirmed per order, according to configuration and quantity
ShippingAir, sea or express, quoted to destination
CustomizationCustomized packaging, nameplate and logo available for volume orders
Warranty1 year

Why Choose Hengyuhang?

  • A hydraulic specialist, not a general trader. Quanzhou Hengyuhang Power Technology Co., Ltd. is based in Fujian, China and manufactures hydraulic gear pumps and motors, synchronous motors, multiple pump units, pumps with built-in valves and custom valve blocks.

  • One-piece minimum order. MOQ is one unit, so a single machine can be put back into service without committing to a production batch.

  • Model-level verification before you order. Send the complete original order number — for this page, the full KP30.34D-83E3-… string — and the configuration is checked against Casappa's KAPPA 30 dimension, flange, shaft and port data before the unit is built.

  • In-house production and testing. CNC machining centres, automatic gear heat-treatment lines, single-piece-flow assembly and an automatic hydraulic test bench, with ERP/MES traceability through production.

  • Replacement coverage across the range. The same plant supplies replacement units for a wide list of hydraulic brands and models, which keeps a mixed machine fleet on one supplier.

  • Customization support. OEM, ODM and OBM are offered, and customized packaging, graphics, nameplate and logo are available for distributor orders.

  • One-year warranty. Every unit is covered by a one-year warranty.

  • Responsive after-sales. Online support for installation and application questions.

CASAPPA KP30.34D-83E3-LED/EB-N Cast Iron External Hydraulic Gear Pump is a rugged, high-pressure external gear pump from the CASAPPA KP30 (Kappa Group 3) series. Constructed with a heavy-duty two-piece cast iron housing, precision-ground gear pairs, and pressure-balanced DU thrust bushings, it features 34.56 cm³/rev displacement (nominal 34 cc/rev), a continuous operating pressure rating of 260 bar, and operating speeds up to 3000 min⁻¹. Equipped with a standard European 4-bolt rectangular mounting flange (code 83), a 1:8 European taper shaft (code E3), and European flanged ports (LED inlet / EB outlet), this pump delivers exceptional volumetric efficiency, high contamination resistance, low operational noise, and long service life under demanding mobile and industrial hydraulic conditions.

| Applications

The KP30.34D-83E3-LED/EB-N hydraulic gear pump is widely deployed across heavy-duty mobile machinery and stationary industrial power units, including excavators, wheel loaders, backhoe loaders, hydraulic cranes, rough-terrain forklifts, agricultural tractors, combine harvesters, forestry logging machinery, hydraulic press feeds, high-pressure lubrication systems, and municipal utility vehicles requiring durable cast iron construction and continuous high-pressure performance.

| Technical Specifications

ParameterSpecification
BrandCASAPPA (OEM / direct replacement)
ModelKP30.34D-83E3-LED/EB-N (KP30.34D0-83E3-LED/EB-N)
SeriesKP30 (Kappa Group 3)
Product TypeCast iron external hydraulic gear pump (single pump)
Housing MaterialHigh-strength cast iron housing and front mounting flange
Nominal Displacement34.56 cm³/rev (34 cc/rev nominal, 2.11 in³/rev)
Continuous Operating Pressure (P1)260 bar (3770 psi)
Intermittent / Peak Pressure (P2/P3)280 / 300 bar (per manufacturer series documentation—confirm before use)
Max. Rotational Speed3000 min⁻¹
Flow @ 1500 rpm51.84 L/min (theoretical, displacement × 1500 rpm)
Overall Efficiency>90%
Mounting FlangeEuropean standard 4-bolt rectangular flange (code 83)
Drive ShaftEuropean 1:8 taper shaft with standard woodruff key (code E3)
Inlet / Outlet PortsEuropean flanged ports — LED inlet / EB outlet (per model code)
Rotation DirectionClockwise (D / D0, viewed from shaft end)
Seal MaterialNBR / Buna-N (code N, standard temperature range)
Hydraulic FluidMineral-based hydraulic oil (ISO VG 46 / HLP)
Operating Temperature Range-25°C to +80°C (standard NBR seals)
Typical ApplicationsExcavators, wheel loaders, backhoes, mobile cranes, agricultural tractors, industrial power packs
Order number
KP30.27D0-83E3-LED/EB-N
KP30.27S0-83E3-LED/EB-N
KP30.27D0-83E3-LED/EB-N-BZ
KP30.27D0-83E3-LED/EB-N-CSC
KP30.27S0-A5K9-LED/GD/GE-W-N-L
KP30.34D0-83E3-LED/EB-N
KP30.34S0-83E3-LED/EB-N
KP30.34B0-83E3-LED/EB-N
KP30.34D0-04S5-LED/EB-N
KP30.34-A8K9-LOF/OD-45-HSC
KP30.38D0-83E3-LED/EB-N
KP30.38S0-83E3-LED/EB-N
KP30.38-05S6-LMF-00-M5-KSL-30
KP30.43D0-83E3-LED/EB-N
KP30.43S0-83E3-LED/EB-N
KP30.51D0-83E3-LED/EB-N
KP30.51S0-83E3-LED/EB-N
KP30.51D0-06S8-LME/OF-N-CSC
KP30.51-A8K9-LSF/OF-M5-CSL/30.4
KP30.56D0-83E3-LED/EB-N
KP30.56S0-83E3-LED/EB-N
KP30.56D0-04S3-LOG/OC/OA-N-P9
KP30.56S0-84E4-LED/ED-N
KP30.56S0-A8K9-POG/OF-N-CSC
KP30.61D0-83E3-LED/EB-N
KP30.61S0-83E3-LED/EB-N
KP30.61D0-84E4-LEF/ED-N
KP30.61D0-A8K9-POG/OF-N-CSC
KP30.73D0-83E3-LED/EB-N
KP30.73S0-83E3-LED/EB-N

Official Casappa order examples for multiple-pump assemblies, for reference:

Order number
KP 30•27 R 0 - 04 S3 - L OF/OD - N - OA - C4 - CSC - VNR01
KP30•51 - A8K9 - L MD/MC - - CSL
KP30•51-A8K9-LMD/MC-NSL

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