Key Features

• Zero Leakage to Atmosphere: The pressurized double seal arrangement uses a barrier fluid to ensure that any leakage is contained within the seal loop, never reaching the environment.

• Optimized for Hydrocarbons: FKM or FFKM O-rings are selected specifically for compatibility with crude oil, diesel, and refined petroleum products.

• Balanced Face Design: Hydraulically balanced faces reduce heat generation, crucial for preventing vaporization of volatile oils.

• Pumping Ring Circulation: Features an integrated pumping ring that actively circulates barrier fluid to a reservoir, removing heat from the seal faces more effectively than passive convection.

• Robust Drive Pins: Heavy-duty drive pins prevent the seal faces from slipping under high viscosity start-up conditions common in oil pumps.

Product Introduction

The double acting O ring mechanical seal for oil pumps is a premium safety sealing system designed for absolute containment of hydrocarbon-based fluids, including lubricating oils, fuels, hydraulic oils, and other petroleum-based products. This mechanical seal employs a dual, pressurized seal arrangement where a clean barrier fluid (often a compatible oil or glycol) is maintained at a higher pressure than the process fluid, ensuring zero process emission to the environment.

Product Specifications

Workshop

This workshop is equipped with professional processing equipment and integrated with standardized material warehousing management, enabling a one-stop production process from precision machining to finished product delivery. O ring mechanical seal ensures part machining accuracy and production efficiency, meeting various high-specification manufacturing requirements.

Product Research, Development and Testing

Our Product R&D and Testing focuses on optimizing seal performance through advanced simulation and material analysis. All O ring mechanical seals undergo rigorous trials, including thermal cycling and pressure tests, to ensure durability, minimal leakage, and long service life in demanding industrial environments.

Industry Solutions

FAQs

Q: Why use a double seal for oil?

A: Many oils are volatile, flammable, or hazardous. A single seal may leak small amounts of vapor. A double pressurized seal (Plan 53A) provides a buffer of clean fluid at a higher pressure than the product, ensuring zero process fluid escapes to the atmosphere.

Q: What barrier fluid should I use with this double acting seal for a lube oil pump?

A: The most common and recommended barrier fluid is a clean, compatible light lubricating oil, often the same as or similar to the process fluid. For high-temperature applications, a synthetic oil with higher thermal stability may be used (Plan 53B). Water-glycol is sometimes used but requires verification of material compatibility. MIAOYU can provide specific recommendations based on your process oil and operating temperature.

Q: How does this seal's "double acting" or "dual pressurized" design work?

A: The O ring mechanical seal has two sets of primary sealing faces. The space between them is filled with a barrier fluid from an external reservoir. A pumping ring (or external pump) maintains this barrier fluid at a pressure higher than the process pressure in the pump. This pressure differential ensures that if a leak path develops, it is the clean barrier fluid that leaks into the process (or to the atmosphere via the outer seal), not the hazardous process fluid leaking out.