300B | Bronze Self-Priming Centrifugal Close Coupled Pump

The 300B Series Bronze Self-Priming Centrifugal Pumps are designed for efficient and reliable performance in various industrial and marine applications. These pumps feature rugged bronze construction and self-priming capabilities up to 20 feet (6,1 m) suction lift, making them ideal for handling a wide range of liquids, including water, oils, fuels, and many industrial chemicals. With multiple mechanical shaft seal options and compatibility with standard NEMA 56J Jet Pump Motors, the 300B Series ensures smooth operation and minimal maintenance, providing a dependable solution for your pumping needs.

Features:

Durability: Constructed with high-quality materials for long-lasting performance.
Versatility: Suitable for a wide range of liquids and applications, including marine and industrial uses.
Efficiency: Self-priming capabilities and high flow rates ensure efficient operation.
Ease of Maintenance: Simple assembly and minimal maintenance requirements reduce downtime and operational costs.
Reliability: Proven performance in demanding environments, ensuring consistent and dependable operation.
Flexibility: Multiple mechanical shaft seal options and motor compatibility offer customization for specific needs.

Self-Priming to 20 Feet (6.1 m) Suction Lift:
Ensures efficient operation without the need for manual priming.

Rugged Bronze Construction:
Provides exceptional durability and resistance to corrosion.

Ideal for Marine Service:
Suitable for air conditioning, bilge, and sea water recirculating applications.

O-Ring Housing Seal:
Eliminates gasket problems, ensuring a secure and leak-free operation.

Auxiliary Connections:
Convenient for priming and draining.

Multiple Mechanical Shaft Seal Options:
Allows customization for various applications.

Pump Heads Mount to Standard Footed NEMA 56J Jet Pump Motors:
Ensures compatibility with standard motor types.

Optional Lifting Handle:
Facilitates easy handling and installation.

High Flow Rate:
Up to 22 gpm (4.99 m³/h) water flow and suction lift of 15 feet (4,5 m) without a foot or check valve (25 feet (7,6 m) with a foot or check valve).

Maximum Flow Rate	Up to 22 GPM (4.99 m³/h)
Suction Lift	15 feet (4,5 m) (without foot/check valve), 25 feet (7,6 m) (with foot/check valve)
Discharge Pressure	Up to 3450 RPM
Materials	Bronze construction, stainless steel shafts, Monel shafts, seal materials: NBR, PTFE, FKM
Seal Options	Mechanical seals for oils, fuels, lubricants, mineral acids, many solvents
Motor Compatibility	NEMA 56J Jet Pump Motors (single and three-phase options)
Pipe Size	1” NPT
Standard mechanical shaft seal	NBR: Suitable for many chemicals and solvents FKM: Suitable for oils, fuels, lubricants, most mineral acids, many solvents PTFE: Suitable for virtually all industrial chemicals, corrosives, and solvents

Marine Service: Ideal for air conditioning, bilge, and sea water recirculating applications.

Industrial Applications: Suitable for pumping various industrial chemicals and solvents.

Cooling Systems: Efficient circulation of cooling fluids.

Lubrication Systems: Reliable lubrication for machinery and equipment.

Water Treatment: Handling non-potable fresh water and salt water.

Item	Part Name	Quantity	OB300B	OB300B-06	OB300BP	OB300BS-10	OB300BS-11
1	Body	1 Req'd	OB7190	OB7190	OB7190	OB7190	OB7190
2	Adapter	1 Req'd	OB7191	OB7191-1	OB7191	OB7191	OB7314
3	Diffuser	1 Req'd	OB7192	OB7192	OB7192	OB7192	OB7192
4*	Impeller	1 Req'd	OB7193	OB7193-1	OB7200	OB7193	OB7193
5*	Seal Assembly	1 Req'd	OB32155	OB33226	OB32155	OB32210	OB32211
6*	Diffuser Gasket	1 Req'd	OB6021-09	OB6021-09	OB6021-09	OB2271	OB2271
7*	O-Ring	1 Req'd	OB9797-157	OB9797-157	OB9797-157	OB9797-157	OB9355-157S
8	Screw	8 Req'd	OB5411	OB5411	OB5411	OB5411	OB5411
9	Plug	1 Req'd	OB7321S	OB7321S	OB7321S	OB7321S	OB7321S
10	Plug	1 Req'd	OB7443S	OB7443S	OB7443S	OB7443S	OB7443S
11* **	Shim	Varies	OB602501, 02 or 03	OB602501, 02 or 03	OB602501, 02 or 03	OB602501, 02 or 03	OB602501, 02 or 03
12	Motor	1 Req'd	See Pump & Motor Options	See Pump & Motor Options	See Pump & Motor Options	See Pump & Motor Options	See Pump & Motor Options
13*	Set Screw	1 Req'd	n/a	n/a	OB9849
14	Handle (Optional)	1 Req'd	OB7766	OB7766	OB7766	OB7766	OB7766
15	Nameplate	1 Req'd	OB7783	OB7783	OB7783	OB7783	OB7783
-	Repair Kit	-	OB10865	OB10867	OB10866	OB11290	OB11604

* Repair kit contains items 4, 5, 6, 7, 11 & 13

**Item 11 is not depicted above

Motor P/N (Item 12)

OB300B-F13 | OB5859

OB300B-01F26 | OB32273

OB300B-F17 | OB3032

OB300B-F21 | OB8214

OB300BP01F65 | OB32355

OB300BP-F57 | OB6996

OB300B-J20| OB7976

OB300B-01J26 | OB32332

OB300B-J24 | OB3031

OB300B-J89 | OB2386

OB300BP-M58 | OB7967

300B | Bronze Self-Priming Centrifugal Close Coupled Pump

Key Features and Benefits:

Technical Specifications

Typical Applications

Exploded View and Parts List

Downloads

Data Sheet - 300B [EN]

I and O - Centrifugal Pumps - Seal Replacement Instructions [EN]

I and O - Bronze or Aluminum Centrifugal Pumps [EN]

Brochure - Marine [EN]

Quick-Pick Selection Charts [EN]

Quick-Pick Selection Charts [EN] (metric)