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NINGBO MIAOYU MACHINERY TECHNOLOGY CO., LTDNINGBO MIAOYU MACHINERY TECHNOLOGY CO., LTD

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O-ring Mechanical Seals

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O-ring mechanical seals offer robust, wear-resistant sealing solutions for static and dynamic applications, tightly sealing gaps to stop fluid leakage and block contaminant entry.
img of Double Acting O-Ring Mechanical Seals for Oil Pumps

Double Acting O-Ring Mechanical Seals for Oil Pumps

Type: Double Acting, Dual O-Ring Cartridge Seal

Application: Oil, Lubricant, and Fuel Pumps

Safety: Zero Leakage, Barrier Fluid System

Material: Nitrile, Viton® O-Rings; Carbon/TC Faces

Construction: Balanced, Pre-Set Cartridge

Compliance: API 682 Arrangement 3 Compatible
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img of Rubber O-Rings Seals for High Temperatures Pumps

Rubber O-Rings Seals for High Temperatures Pumps

• Isolated Spring Design: Springs are located outside the fluid in many configurations to prevent them from annealing or clogging in hot, dirty media.

• Face Material Selection: We pair these seals with Hot Water Carbon or Sintered SiC faces that maintain flatness even under thermal stress.

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img of 5/8 O-Rings Face Mechanical Seal for Jockey Pump

5/8 O-Rings Face Mechanical Seal for Jockey Pump

Shaft Size: Precision-fit for 5/8" (15.88mm) shafts

Compliance: Engineered to NFPA 20 guidelines for jockey pumps

Construction: Simple, reliable O-Ring Face design

Material: 304/316SS, Carbon/Ceramic faces, Buna-N/EPDM O-Rings

Reliability: Long standby life, instant start capability

Value: Cost-effective, direct OEM replacement

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img of 40mm 45mm O-Ring Non Pusher Mechanical Seal

40mm 45mm O-Ring Non Pusher Mechanical Seal

• Shaft Protection: Unlike standard pusher seals, the sealing O-ring is static against the shaft, eliminating the need for a hardened shaft sleeve.

• Self-Aligning: The flexible rubber body allows the seal face to self-align against the stationary seat, compensating for misalignment.

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img of Triple Hydrocarbon Pump O-Ring Mechanical Sleeve Seal

Triple Hydrocarbon Pump O-Ring Mechanical Sleeve Seal

• Zero-Emission Assurance: The triple arrangement allows for cascading pressure drops or high-pressure barrier fluids, ensuring absolutely no process fluid reaches the atmosphere.

• Cartridge Assembly: Despite the complexity of three seals, it installs as a single cartridge unit, simplifying maintenance on complex multi-stage pumps.

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img of Flowserve Pac-Seal Type 21 O-Ring Mechanical Seal

Flowserve Pac-Seal Type 21 O-Ring Mechanical Seal

• Torque Handling: The drive band transmits torque from the spring to the face more reliably than friction-drive seals, making it suitable for higher viscosity fluids.

• Field Repairable: The simple component design allows for easy field replacement of worn faces or O-rings if the metal parts are still good.

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img of John Crane Type 1 O-Ring Pusher Mechanical Seals Replacement

John Crane Type 1 O-Ring Pusher Mechanical Seals Replacement

• Positive Drive: The spring grips the shaft (interference fit) to drive the rotary head, eliminating the need for set screws that can mar the shaft.

• Balanced Face Loading: The single spring provides uniform face pressure, ensuring a tight seal even as the face wears down over time.

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img of O Ring Mechanical Seal For Pumps & Compressors

O Ring Mechanical Seal For Pumps & Compressors

• Thermal Stability: SiC's high thermal conductivity helps dissipate the heat generated by two sets of seal faces, preventing barrier fluid overheating.

• Universal O-Ring Grooves: Designed with standard O-ring groove dimensions, allowing easy switching between NBR, FKM, or FFKM elastomers based on chemical needs.

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img of O-Ring Balanced Mechanical Seal for Hydrocarbon Pump

O-Ring Balanced Mechanical Seal for Hydrocarbon Pump

The O ring balanced mechanical seal is a high-performance sealing solution engineered specifically for the demanding conditions of oil, gas, and petrochemical applications. This O ring mechanical seal is ideal for centrifugal pumps in refineries, offshore platforms, and chemical plants, providing extended service life, enhanced safety, and compliance with industry standards like API 682.

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img of Non Pusher Single Acting O Ring Mechanical Seals

Non Pusher Single Acting O Ring Mechanical Seals

• Clog Resistant: The smooth bellow profile sheds fibers and solids, making it superior to spring pusher seals in dirty water.

• Self-Adjusting: The bellow automatically compensates for shaft end-play and runout without parts sticking or hanging up.

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img of O Ring Alumina/Ceramic Mechanical Seals for Mixer

O Ring Alumina/Ceramic Mechanical Seals for Mixer

• Dry-Run Tolerance (with Carbon): When paired with Carbon, the Alumina face handles the intermittent dry running often found in batch mixing processes better than SiC/SiC.

• Chemical Inertness: Alumina Ceramic is inert to most acids and food products, making it ideal for food and chemical mixing tanks.

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img of John Crane O-Ring Pusher Mechanical Seals

John Crane O-Ring Pusher Mechanical Seals

Replace Brand: John Crane mechanical seal

Specification:  type 6/type 8/type 9/type 21/109b/2100/5610/8b1/8b2

Temperature: high temperature mechanical seal

Balance: Unbalanced

Type: Multi-Spring

Accreditation: ISO, SGS, UL, ROHS

Service: OEM/ODM

Origin: China

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img of Type 21 Cartridge Seals with O-Rings for Gear Pump

Type 21 Cartridge Seals with O-Rings for Gear Pump

• Positive Torque Drive: The cartridge sleeve locks firmly to the shaft, preventing the seal from slipping even when the gear pump handles cold, thick oil.

• Compact Gland: The gland plate is minimized to fit the bolt patterns of common internal gear pumps.

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    Our company is specialized in the production of sealing materials, mechanical seals , cartridge seals.

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