Blackmer Technology

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Get in-depth information about Blackmer pump and compressor technologies while learning why our solutions are the ideal choice to help solve your most critical fluid-handling applications.

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Blackmer Products

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Blackmer® is the leading global provider of innovative, high-quality sliding vane, centrifugal, screw and regenerative turbine pump, and reciprocating gas compressor technologies for the safe transfer of liquids and gases.

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Sliding Vane Pumps

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Blackmer Markets

Providing Innovative Product-Transfer Solutions for a Variety of Markets and Applications

Blackmer provides innovative product transfer solutions for many markets and applications, including in the chemical process, energy, transport, military & marine; general industrial, and oil & gas industries.

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Blackmer Internal Gear Pumps

Blackmer offers a range of internal gear pumps ideally suited for applications where high- or wide-ranging viscosities are prevalent. Internal gear pumps operate on the “gear within a gear” principle. Liquid enters the suction port between the teeth of the rotor gear (the larger exterior driven gear) and the idler gear (the smaller interior gear). As the gear pump rotates to suction the teeth of the gears come out of mesh, an atmospheric vacuum or low-pressure zone is created at the suction port, pulling liquid into the spaces.

Features and Benefits

  • Port sizes up to 6" (152 mm)
  • Capacity capabilities ranging from 15 gpm (3.4 m³/h) to 500 gpm (113.6 m³/h)
  • Ability to handle up to 431,500 cSt
  • Temperatures up to 650°F (343°C)
  • Direct replacement part and pump interchangeability
  • Positive displacement pump technology


  • Resins and Polymers
  • Molten Sulfur
  • Adhesives
  • Liquid Terminals
  • Asphalt Roofing
  • Asphalt Emulsion
  • Asphalt Hot Mix
  • Soap & Detergents
  • Edible Fats and Oils
  • Lube Oils

Blackmer Internal Gear Pumps

Blackmer® is a global provider of innovative, high-quality industrial internal gear pumps for the safe and efficient transfer of viscous, high-value and/or hard-to-seal fluids. Models include magnetic drive gear pumps, bracketed internal gear pumps, stainless steel gear pumps and jacketed gear pumps for asphalt.

E Series Magnetic Drive Gear Pumps

Blackmer® E Series Magnetic Drive Gear Pumps feature a revolutionary design with a patented between-the-bearing support system. Our innovative E Series magnetically driven seal-less pumps eliminate seal leaks, reduce mechanical wear with its patented design features and safely guards site personnel and the environment.

E Series Brochure

1Integral Relief Valve


  1. Tamper resistant design
  2. Relieves by cracking at nominal pressure relief setting
  3. Contains only three components (valve cover, poppet and spring)


  1. Protects pump against over pressure condition
  2. Prevents unsafe misuse of the pressure relief valve
  3. Minimizes the chance for unwanted flow rate leakage through PRV

2Jackscrew Disassembly Holes


  1. Jack screw holes in head


  1. Simplifies disassembly and reduces downtime

3Heavy-Duty Casing Materials


  1. High strength ductile iron, grade WCB carbon steel or 316 Stainless Steel available


  1. Three materials available to suit your application needs
  2. Excellent corrosion resistance

4Static O-Ring Seals


  1. Only 2 static O-rings seal the fluid chamber
  2. Viton® is standard
  3. FEP-encapsulated Viton, PFA-encapsulated Silicone, Kalrez (optional)


  1. Improved leak protection over flat gaskets
  2. Excellent protection against corrosive fluids

5High Quality Gear Materials


  1. 1141 Steel (carbon steel and ductile iron models)
  2. 17-4PH Stainless Steel (stainless steel models)


  1. High tensile strength and long wear life
  2. Excellent corrosion resistance

6Between-the-Bearings Support System


  1. Eliminates traditional cantilever design
  2. Eccentric spindle is stationary and fully supported in three locations (head, crescent, and canister)
  3. Large bushings to optimally distribute loads


  1. Improved radial support of idler gear and rotor
  2. Longer mean time between repair
  3. Suitable for all viscosities

7Robust Bushing Design


  1. Premium grade carbon-graphite (standard)
  2. Bronze, tungsten carbide and resin-impregnated carbon graphite (optional)
  3. Lubricated and cooled by internal recirculation


  1. Longer wear life
  2. Suitable for a wide range of viscosities
  3. Broad chemical compatibility
  4. Run-dry capability
  5. Reduced load and increased wear life

8Containment Canister


  1. Single fluid chamber design
  2. Patent-pending design is strong, yet minimizes heat generation
  3. 316 Stainless Steel construction


  1. Improved fluid circulation
  2. Excellent corrosion resistance
  3. More reliable pump operation
  4. Higher viscosity capabilities

9Rare Earth Magnet System


  1. Neodymium-iron-boron magnets standard
  2. Samarium cobalt magnets optional
  3. Optimized magnet size and spacing


  1. Increased torque for high viscosity fluids
  2. High temperature capabilities
  3. Reduces chances of decoupling

10Canister Protection


  1. Skid pads in magnet housing
  2. Hub in support plate


  1. Prevents canister damage if bearings or bushings fail

11Powder Coated External Surfaces


  1. High-quality polyester powder coating of external surfaces (excluding Stainless Steel surfaces)
  2. Superior adhesion and hardness


  1. Chemically resistant
  2. Resistance to chipping and peeling

12Integral Foot


  1. Integral with magnet housing


  1. Optimal shaft alignment
  2. Rigid mounting

13SKF® Explorer Deep Groove Ball Bearings


  1. Very precise tolerances
  2. Optimized internal surface finishes
  3. Greased with lifetime seal


  1. Longer bearing service life
  2. Lower maintenance and operating costs
  3. Maintenance-free

14No End Clearance Adjustment


  1. Rotor-to-head clearance predetermined by spindle design


  1. No adjustments needed
  2. Self-adjusts for temperature changes
  3. Reduced assembly and maintenance time
Envirogear E Series Pump

G Series Internal Gear Pumps

Blackmer® G Series Internal Gear Pumps are durable, flexible and efficient positive displacement gear pumps that excel in challenging fluid-handling applications. Our G Series product line is a traditional mechanically sealed workhorse. The G-Series is part-for-part and footprint interchangeable with the Viking 124/4124, 123/4123 and 127/4127A model series.

G Series Brochure

1Pressure Relief Valve

Protects pump and seals in the event of excessive pressure.

1Jacketed Pressure Relief Valve Option

  • Ensures that the valve is at appropriate operating temperature when it needs to open
  • Jacketed valve recommended with jacketed head
  • Available on G2-55, G2-69, G2-82, G2-133, and G2-222 cast iron models

2Head Screws

Securely fastens head to case.


Top end of pump that supports idler gear and one side of the rotor shaft assembly. Contains ports and mounting point for pressure relief valve. Heavy-duty construction for rugged use and long life.

3Jacketed Head Option

  • Large, jacketed surface area
  • Maintains product and process temperature
  • Keeps liquid at appropriate viscosity to maintain proper lubrication of the bushings/pin
  • Available on G2-55, G2-69, G2-82, G2-133, and G2-222 cast iron models

4Head Gasket

Seals surface between case and head.


Central body casing of pump with inlet and outlet ports. Case can be rotated for multiple inlet/outlet and flow orientation.

5Jacketed Case Option

  • Adding jacketed case ensures the highest level of temperature and process control
  • Available on the G2-55 and G2-133 case iron sizes only

6Idler Gear

Connected to and driven by the rotor/shaft assembly.

7Bracket Gasket

Seals surface between case and bracket.

8Rotor/Shaft Assembly

Consists of shaft and rotor gear, and drives idler gear. Can rotate in either direction to reverse pumping direction as required.


Pump frame with easy access mounting holes for bolting down pump at installation site. Durable construction for minimal vibration and long life.

9Jacketed Bracket Option

  • Standard and required option when choosing a jacketed design
  • Provides temperature control in the bushing area that radiates to the low velocity area behind the rotor, a typically cold spot in the pump
  • Keeps material in the seal area warm, which prevents product from hardening and damaging the seal upon startup
  • Available on G2-55, G2-69, G2-82, G2-133, and G2-222 cast iron models

10Bracket Screws

Securely attaches case to bracket.


Low cost substitute for seals; minimizes/controls leakage of rotor/shaft assembly.

12Mechanical Seal

Provides secure sealing around rotor/shaft assembly.

13Seal/Packing Gland

Securely houses seal or packing around rotor shaft.

14Gland Screws

Firmly attaches seal gland to bracket.

15Bearing Housing Assembly

Allows smooth, accurate rotation of rotor shaft assembly. Enlarged bearing housing provides easy access to shaft seal and single-point end-clearance adjustment for ease of maintenance and adjustability.

Envirogear G Series Pump

V Series Asphalt Pumps

Blackmer® V Series Internal Gear Pumps address and overcome the challenges of pumping asphalt in a way that is safe, reliable and economical. Our V Series line of internal gear pumps line is specifically designed for asphalt transfer. The design utilizes unique engineering modifications enhancing the overall performance of the pump in very demanding hot mix and roofing and bulk transfer applications. Our V Series Asphalt Pumps are part-for-part and footprint interchangeable with the Viking 32 and 34 model series.

V Series Brochure

1Rotor Bearing Sleeve (RBS)

The Rotor Bearing Sleeve (RBS) and seal chamber is designed to accept a wide range of bushing options as well as sealing technologies such as packing, cartridge triple-lip seal, and cartridge mechanical seal.

2Rear Plate with Jacketing

Provides jacketing behind the rotor to eliminate cold spots

3Heavy-Internal Clearance Options

A wide range of internal clearance options are available, which allows optimal performance in a wide range of applications

4Hardened Idler Pin

Standard on all pump sizes for maximized operational life

5High-Strength Rotor Standard

High-strength, ductile iron rotor comes standard on all sizes, eliminating the need for costly, long lead-time steel rotors

6Jacketed Head with PRV

Jacketed head designed to incorporate an optional pressure relieve valve (PRV), offering pressure protection with improved head heating

7Seal/Packing Gland

Securely houses seal or packing around rotor shaft.

Envirogear V Series Pump