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jbj Techniques Limited
Micro 0.25 & 0.5 series external gear pumps Groups 0.25 & 0.5

Micro 0.25 & 0.5 series external gear pumps Groups 0.25 & 0.5

Product catalog summary

Overview
The document provides comprehensive technical details on Marzocchi's Micro 0.25 and 0.5 series external gear pumps, emphasizing their engineering excellence and suitability for high-pressure applications. These pumps are designed for modern hydraulic systems, offering versatility, strength, and long service life.

Specifications
The gear pumps are available in two groups, 0.25 and 0.5, differentiated by tooth profile. Constructed with high-resistance aluminum alloys and special steel gears, they ensure minimal deformation under high pressure. Features include a twin-lip seal ring for effective sealing and low noise operation due to the helical gear profile.

Product Range
The range includes micropumps for high-pressure applications, bi-rotational micropumps, micropumps with check valves, and modular multiple micropumps. Special versions are available for high-temperature fluids and varying pressure conditions.

Technical Information
Proper installation and maintenance are crucial for optimal performance and longevity. Recommendations include ensuring correct alignment of pump and motor shafts, protecting the drive shaft seal, and maintaining a clean contact area to prevent wear and leakage.

Installation Notes
Before continuous operation, verify the pump's rotation direction, ensure proper alignment, and fill the pump with fluid. Avoid starting the system under load at low temperatures or after long periods of inactivity to extend pump life.

Performance and Efficiency
Designed to operate under heavy conditions, these pumps transmit high hydraulic power with good efficiency, featuring low noise levels and compact dimensions, suitable for various applications, including automotive and racing.

Cleaning and Filtration
Contaminated fluids are a primary cause of micropump failures. Preventive measures include thorough cleaning during assembly, deburring, and fluid filtration before filling. The initial contamination level should not exceed ISO 4406 class 18/15.

Inlet Pressure and Rotation Speed
Under standard conditions, intake pressure should be below atmospheric pressure, with specified operating ranges. Special versions are available for higher pressures. Micropumps can operate at various rotation speeds, with maximum and minimum values specified per model.

Hydraulic Fluids
Use mineral oil-based hydraulic fluids with anti-wear, anti-foaming, antioxidant, anti-corrosion, and lubricating properties. Fluids should comply with DIN 51525 and VDMA 24317 standards.

Pressure Definition
Product tables define three maximum pressure levels (P1, P2, P3) for micropumps, with specific time limits for each. These pressures can be reached only if rotation speeds do not exceed specified limits.

Inlet and Delivery Lines
Hydraulic pipes should avoid sudden direction changes, sharp bends, and disproportionate lengths. Pipe cross-sections should be sized to maintain recommended fluid velocities.

Direction of Rotation
Marzocchi micropumps are available in single and bi-rotational configurations. The rotation direction is defined based on the observer's position relative to the pump.

Drive Connection
The pump should be connected to the motor via a coupling that does not transfer radial or axial forces to the pump shaft.

Specifications and Procedures
The document provides detailed specifications and procedures for the operation and selection of Marzocchi external single gear micropumps, emphasizing the importance of using flexible couplings to connect the micropump to the motor.

Formulas and Calculations
Includes formulas for calculating key parameters such as fluid velocity, delivered flow rate, absorbed torque, and absorbed power.

Micropump Operation and Selection
Describes the operation of micropumps, emphasizing that they transfer fluid without generating pressure, which is instead determined by the circuit's resistance.

Options and Configurations
Various options for flanges, shafts, and port positions are available to meet specific customer needs.

Diagrams and Tables
Contains diagrams and tables illustrating typical power requirements for different displacements and configurations.

Mounting Specifications
To mount the pump, use two M5 screws with a torque setting of 5.4 ± 0.5 Nm.

Technical Specifications
Provides detailed specifications for various pump models, including displacement, flow rate at 1500 rpm, maximum pressures, and dimensions.

Performance Curves
Performance curves are provided for different models, showing the relationship between speed, power, and torque at various pressures.

High-Pressure Micro-Pumps (RO Version)
The RO version is designed for high-pressure applications and requires strict adherence to system design, filtration, and cleanliness.

Reversible Micro-Pumps
Reversible micropumps can operate in both clockwise and counterclockwise directions due to their symmetrical internal design.

Standards and Norms
Mentions compliance with specific standards for accessories like the Woodruff Key and hexagonal nuts.

Recommendations
It is recommended to specify applications requiring high reliability during the order process for special approval.

Options
Various options are available for inlet and outlet ports, including configurations like "KE" and "L".

Key Data from Tables
Tables provide detailed measurements and performance data for different pump models.

Company Overview
jbj Techniques Limited is a UK-based distributor specializing in high-quality products for mechanical power transmission and fluid power sectors.

Product Portfolio
Offers an extensive selection of products, including gear couplings, gearboxes, clutches, pumps, hydraulic motors, and more.

Customer and Supplier Relationships
Prides itself on strong relationships with both customers and suppliers, ensuring high-quality service and customer confidence.

Engineering Excellence
The in-house design team offers a complete service, including CAD-based system design and certification.

Certifications
jbj Techniques Limited is ISO certified and committed to international coordination and unification of industrial standards.

Catalog excerpts

Micro 0.25 & 0.5 series external gear pumps Groups 0.25 & 0.5-1

Micro 0.25 & 0.5 series external gear pumps Groups 0.25 & 0.5 GEAR PUMPS Quality Products for Mechanical & Fluid Power

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Micro 0.25 & 0.5 series external gear pumps Groups 0.25 & 0.5-2

an excellence in engineering www.jbj.co.uk/pumpsandmotors.html pumpsandmotors Reduce noise levels by an average of 15 dBA. Gear pump high pressure, teﬂon shaft seal can Including group 2, 3 and multiple pumps. The bear over-pressures of over 210 bar. A system of helical proﬁle of the gears reduces pressure radial sealing at the shaft that can bear enormous oscillations and vibrations produced by the pump internal over-pressures without resulting in and transmitted to the other components, reducing damage. This radial sealing is particularly useful in the noise of the hydraulic system. Axial forces...

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Micro 0.25 & 0.5 series external gear pumps Groups 0.25 & 0.5-3

Techniques Limited; UK distributor for pagina / pages Informazioni generali Progetto di base Gamma di prodotto Versioni speciali Informazioni tecniche Note per I'installazione Pulizia dell'impianto e filtrazione Fluidi idraulici Pressione in aspirazione Velocita minima di rotazione Definizione delle pressioni Condotti d'aspirazione e mandata Senso di rotazione Trascinamento Formule di uso corrente Micropompe singole monodirezionali 0.25 curve caratteristiche 0.5 curve caratteristiche Micropompe per alta pressione - Versione RO Micropompe singole reversibili Micropompe multiple modulari Accessori...

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Micro 0.25 & 0.5 series external gear pumps Groups 0.25 & 0.5-4

Techniques Limited; UK distributor for . . . . . . . . . . PROGETTO DI BASE La pompa ad ingranaggi esterni è uno dei componenti maggiormente impiegato nei moderni impianti oleodinamici. Essa unisce in sé caratteristiche di versatilità, resistenza, lunga durata. La semplicità nella costruzione permette costi d’acquisto e di manutenzione contenuti. Il consolidamento di questi concetti base, uniti alla continua evoluzione dei prodotti, allo sviluppo della progettazione e della ricerca basate su decenni d’esperienza, alla precisa scelta dei materiali, alla costante cura sia del processo di produzione...

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Micro 0.25 & 0.5 series external gear pumps Groups 0.25 & 0.5-5

Techniques Limited; UK distributor for MICROPOMPA IN DETTAGLIO 1 - INGRANAGGIO CONDUTTORE 2 - I NGRANAGGI O CONDOTTO 3 - BOCCOLE 4 - CORPO 5 - FLANGIA 6 - COPERCHIO 7 - ANELLO DI TENUTA 8 - GUARNIZIONI 9 - ANTIESTRUSIONE 10 - ANELLO ELASTICO D'ARRESTO MICROPUMP IN DETAIL I - DRIVE GEAR 2 - DRIVEN GEAR 3 - BUSHINGS 4 - BODY 5 - FLANGE 6 - COVER 7 - ROTARY SHAFT SEAL 8 - SEALS 9 - ANTI-EXTRUSION SEALS 10 - STOP RING

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Micro 0.25 & 0.5 series external gear pumps Groups 0.25 & 0.5-6

Techniques Limited; UK distributor for GAMMA DI PRODOTTO Le micropompe ad ingranaggi Marzocchi sono prodotte in due differenti gruppi: 0.25 e 0.5. Li distingue solo la diversa tipologia di profilo del dente; all'interno di ogni gruppo, le diverse cilindrate si ottengono variando lo spessore di fascia dentata dell'ingranaggio. La nostra gamma di produzione permette di poter scegliere, all'interno di ogni gruppo, diverse opzioni di flange, alberi o porte d'aspirazione e mandata. Sono inoltre disponibili versioni di: - micropompe dedicate ad utilizzi con alte pressioni - micropompe reversibili -...

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Micro 0.25 & 0.5 series external gear pumps Groups 0.25 & 0.5-7

Techniques Limited; UK distributor for . . . . . . . . . . TECHNICAL INFORMATION Per ottenere dalle micropompe Marzocchi le migliori condizioni in termini di durata e prestazioni è consigliato seguire le raccomandazioni e i suggerimenti di installazione ed utilizzo indicate nel presente catalogo. Per quanto riguarda il sistema idraulico nel quale andrà inserita la micropompa, valgono alcune considerazioni generali: prestare molta cura nella progettazione e nella realizzazione dell’intero impianto, in special modo per quanto riguarda i condotti d’aspirazione, di mandata, di ritorno, e la posizione...

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Micro 0.25 & 0.5 series external gear pumps Groups 0.25 & 0.5-8

Techniques Limited; UK distributor for PULIZIA DELL'IMPIANTO E FILTRAZIONE E ormai universalmente riconosciuto che la maggior parte dei prematuri cali di prestazioni delle micropompe e dovuta ad un loro funzionamento con fluidi contaminati; l'estrema riduzione delle tolleranze che contraddistinguono i piccoli componenti delle micropompe e il loro conseguente funzionamento con giochi ridotti, possono essere irrimediabilmente compromessi se non si pone estrema cura nel mantenere il fluido pulito. E comunemente accertato che le particelle circolanti continuamente nel fluido agiscono come agente...

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Micro 0.25 & 0.5 series external gear pumps Groups 0.25 & 0.5-9

Techniques Limited; UK distributor for FLUIDI IDRAULICI Si raccomanda i'uso di fluidi specifici per circuiti idraulici a base d'olio minerale, con buone caratteristiche antiusura e antischiuma, con proprieta di rapida disareazione, antiossidanti, anticorrosione, lubrificanti e in grado di soddisfare quanto previsto dalla norma DIN 51525, dalla norma VDMA 24317 e di superare l' 11 ° stadio della prova FZG. La temperatura del fluido durante il funzionamento della pompa deve essere compreso tra: HYDRAULIC FLUIDS Use specific mineral oil based hydraulic fluids having good anti-wear, anti-foaming...

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Micro 0.25 & 0.5 series external gear pumps Groups 0.25 & 0.5-10

Techniques Limited; UK distributor for PRESSURE DEFINITION DEFINIZIONE DELLE PRESSIONI Le tabelle di prodotto presentano tre livelli massimi di pressione (P], P2, P3) alle quali ogni pompa puo essere sottoposta; si intende con: Product tables show three max. pressure levels (Pj, Pp and Pjj to which each micropump can be used. Diagramma pressione in funzione del tempo. Si noti: P2 = max. 20 s P3 = max. 2 s I valori di pressione Pp P2 e P3 possono essere raggiunti solo se non vengono superati i seguenti regimi di rotazione: Pressure diagram as a function of time. Note that: Pp = max. 20 s P3 =...

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Micro 0.25 & 0.5 series external gear pumps Groups 0.25 & 0.5-11

Techniques Limited; UK distributor for . . . . . . . . . . Le micropompe Marzocchi possono essere fornite sia in configurazione monodirezionale che bidirezionale. Il senso di rotazione di una pompa monodirezionale è definito per convenzione nel seguente modo: guardando la pompa frontalmente con l’albero conduttore posizionato verso l’alto e sporgente verso chi guarda, se si tratta di rotazione destra “D”, il suo movimento sarà in senso orario e di conseguenza il lato mandata sarà posto a destra e quella d’aspirazione a sinistra. Viceversa per pompe con rotazione sinistra “S” mantenendo naturalmente...

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