Series 4360 & 4380

Summary

Product identification

The Armstrong Series 4360 and 4380 are Close Coupled Vertical In-Line Pumps, described as single-stage, single-suction types with rising head to shut-off pump characteristics.

Operating limits

• Hydrostatic Test Pressure: 150% maximum working pressure at ambient temperature.
• Liquid Compatibility: All values are based on clear, clean water. Values may change with other liquids.
• Pressure/Temperature Chart: The document includes pressure/temperature charts for various configurations:
  • Cast iron with NPT connections and standard seal (Series 4360b).
  • Cast iron with standard seal NPT connections (Series 4360d) or ANSI 125 flanges (Series 4380).
  • Ductile iron with standard seal ANSI 250 flanges (Series 4380 only).
  • See the official PDF for exact tabulated values.
• Series 4360 Casing: Suitable for 175 psig (12 bar) working pressure at 140°F (60°C).
• Series 4380 Casing:
  • Cast iron suitable for 175 psig (12 bar) working pressure at 140°F (60°C).
  • Ductile iron suitable for pressures to 250 psig (17 bar).
• Seal Material Temperature Limits:
  • Resin bonded carbon is used, with antimony loaded carbon for liquids above 200°F (93°C).
  • Silicon carbide is used for glycols above 30% by weight.

Feed water

• Values are based on clear, clean water.
• For potable water supply, mechanical seals utilize Resin Bonded Carbon and EPDM l-cup mounted Silicon Carbide faces.

Electrical

• Motor power requirements are the minimum acceptable and are sized for continuous operation without exceeding the full load nameplate rating over the entire pump curve, exclusive of service factor.
• Available motor frames include 56c, jm, and jm/jp.

Mechanical / hydraulic

General Design Features (Series 4360 & 4380)

• Industry standard face mounted motor.
• Flush and vent connection removes entrained air and ensures liquid at seal face at all times.
• Inside type mechanical seal with Silicon carbide seat, serviceable without breaking pipe connections.
• Heavy cylindrical bracket with 360° register on both flanges provides a rigid union of pump and motor.
• Dynamically balanced impeller assures smooth vibration-free operation.
• Radially split casing with equal suction and discharge flange sizes.
• Separate tapped openings for gauge, flush and drain connections.
• Liberal inlet passageways and straightening vanes provide optimum suction performance and quiet operation.
• Ribs cast integral with casing, with a machined surface to accept floor support when specified.
• Confined casing gasket to meet stringent industrial temperature and pressure applications.

Series 4360 Specific Design Features

• Easy to service: Radially split casing permits removal of the motor and pump rotating assembly without removing the pump casing from the line.
• Easy removal of complete pump from the line when necessary, due to companion flanges supplied with the pump.
• Equal suction and discharge connections result in simplified piping design and installation.
• Fewer maintenance and servicing problems due to bearing-free pump design.

Typical Applications

• Cooling and heating systems.
• Pressure boosting systems.
• Industrial applications requiring a compact pump.
• OEM applications (Cooling tower, spray washer, fountain, etc.).

Pump Construction (Series 4360)

• Pump Casing: Cast iron, radially split, provided with NPT threaded companion flanges, gaskets, and hardware. Hydrostatically tested to 150% maximum working pressure.
• Pump Impeller: Fully enclosed type, keyed and secured to the pump shaft by stainless steel fittings.
• Pump Shaft: Stainless steel stub shaft for frame 56 motors. Steel motor shaft enclosed by a bronze shaft sleeve on other motor frame sizes.
• Mechanical Seal:
  • 4360b: Single spring inside type with resin bonded carbon and ceramic faces with Buna-N elastomer.
  • 4360d: Single spring inside type with Resin bonded carbon* and Silicon carbide faces, with stainless steel spring and hardware. (For potable water supply: Resin Bonded Carbon and EPDM l-cup mounted Silicon Carbide faces).
  • Includes a factory-installed seal vent line, piped from the seal area to the pump suction connection.

Pump Construction (Series 4380)

• Pump Casing: Cast iron or ductile iron, radially split. Suction and discharge connections are the same size and include drilled and tapped seal vent and pressure gauge connections. Hydrostatically tested to 150% maximum working pressure.
• Pump Impeller: Bronze, fully enclosed type, dynamically balanced.
• Shaft Sleeve: Bronze, extending the full length of the mechanical seal area.
• Mechanical Seal: Single spring inside type with Resin Bonded Carbon* and Silicon Carbide faces, with stainless steel spring and hardware. (For potable water supply: Resin Bonded Carbon and EPDM l-cup mounted Silicon Carbide faces).
• Includes a factory-installed seal vent line, piped from the seal area to the pump suction connection.

Materials of Construction

The document provides a detailed table of materials for various components across different pump series (4360b, 4360d, 4380) and ANSI flange ratings (125, 250). Components include casing, impeller, capscrew, washer, acorn nut, gasket, adapter bracket, motor shaft, shaft sleeve, stub shaft, shaft spacer, water slinger, seal washer, seal seat, seal hardware, seal elastomer, seal spring, and companion flanges.

Common materials listed include:

• Metals: Cast iron (ASTM A48 Class 30), Cast ductile iron (ASTM A536 Grade 65-45-12), Cast bronze (ASTM B584 Grade C84400), Hard brass tubing (ASTM B111.687), Brass plate, Carbon steel, Plated steel, Stainless steels (ASTM A564 Type 18-8, ASTM A314 Type 303, ASTM A276 Type 304, AISI 1010-1018 Type 316, ASTM A314 Type 416).
• Elastomers/Seals: Buna-N rubber, Fiber, Neoprene, Resin bonded carbon (with antimony loaded carbon for higher temperatures), Ceramic, Viton O-ring (EPDM l-cup on potable water), Silicon carbide.

See the official PDF for exact tabulated values.

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Disclaimer: This summary is based on the extracted text and may not include all figures, footnotes, or the latest revisions from the complete OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

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