H7N Multi Spring Mechanical Seal

Qixing H7N Multi Spring Mechanical Seal is an O-ring mechanical seal designed for a broad range of fluid handling applications. It is available for shaft sizes from 14 mm to 100 mm and supports operating temperatures from -20°C to +180°C, pressure up to 2.5 MPa, and sliding speed up to 15 m/s. The seal can be configured with multiple face, secondary seal, spring and metal-part material combinations according to the application requirements.

Typical media listed for the H7N include clean water, sewage water, oil and other moderately corrosive fluids. Standard seat type is G9, with G92 available as an alternative.

Key Features

• H7N multi spring mechanical seal with O-ring secondary sealing design.
• Available shaft size range: 14-100 mm.
• Operating temperature range: -20°C to +180°C.
• Maximum operating pressure: 2.5 MPa.
• Maximum sliding speed: 15 m/s.
• Standard seat type: G9; alternative seat type: G92.
• Material-code options are available for stationary rings, rotary rings, secondary seals, springs and metal parts.
• Suitable for clean water, sewage water, oil and other moderately corrosive fluids as listed in the product specifications.

Technical Specifications

Applications

H7N Multi Spring Mechanical Seal can be considered for equipment handling:

• Clean water
• Sewage water
• Oil
• Other moderately corrosive fluids

For fluids outside these listed categories, confirm face and elastomer compatibility before selection.

Material Selection

Material options are identified by selection codes. Available codes include:

• Stationary ring: V1 / Q1 / Q2 / U2 / B / A
• Rotary ring: B / A / Q1 / Q2 / U2
• Secondary seal: P / E / V / M1 / M2
• Spring and metal parts: F / G / M

How to Select the Right H7N Seal

For faster model confirmation and quotation, provide the following information with your inquiry:

• Required shaft diameter (d).
• Working medium / fluid.
• Operating temperature.
• Operating pressure.
• Rotational or sliding speed.
• Required material code combination, if already specified.
• Required seat type (G9 or G92), if known.

H7N Design and Selection Considerations

The product is classified as the H7N as part of an O-ring mechanical seal series and identifies it as a multi-spring design. For product selection, the most important step is to match the seal size, operating limits, seat arrangement and material-code combination to the actual equipment and fluid conditions rather than relying on the model name alone.

The H7N series covers shaft diameters from 14 mm to 100 mm. Because the dimensional table changes with shaft size, buyers replacing an existing seal should compare the shaft diameter and the listed installation dimensions before ordering. This is especially important when the H7N is being sourced as a replacement for an existing mechanical seal.

The product specifications give a temperature range of -20°C to +180°C, maximum pressure of 2.5 MPa and maximum sliding speed of 15 m/s. These values describe the listed operating envelope, but the final usable limit can also depend on the selected face and elastomer materials, the handled medium and the actual equipment conditions. When the application is close to the stated limits, provide the full operating data for confirmation.

For the stationary seat, G9 is listed as the standard option and G92 as an alternative. If a replacement seal is being matched to an existing installation, the seat type and relevant dimensions should be confirmed together with the rotating seal assembly.

Replacement and Procurement Matching

For replacement and purchasing inquiries, the H7N model designation is a useful starting point, but it should be supported by dimensional and operating information. Supplying the following details can reduce back-and-forth during model confirmation:

• Existing seal model or reference, if available.
• Shaft diameter and key installation dimensions.
• Pump or equipment information, when available.
• Working medium and whether solids or corrosive components are present.
• Normal and maximum operating temperature and pressure.
• Rotational speed or required sliding speed.
• Preferred seat type and material-code combination, if already specified.

If the original seal is worn or the model marking is unclear, dimensional matching becomes especially important. A clear photo of the old seal together with the shaft size and operating conditions can also be used as supporting information for product matching.

Application Selection Notes

The product specifications list clean water, sewage water, oil and other moderately corrosive fluids for this series. These categories cover different chemical and operating conditions, so the fluid name alone is not enough to determine the final material combination. For sewage or fluids containing suspended particles, and for oils or corrosive media with unusual additives, provide the actual medium details before confirming the seal materials.

For applications outside the media categories stated in the product specifications, Qixing should first check the requested operating conditions and material compatibility before presenting a configuration. This avoids presenting an unsupported universal-use claim for the H7N.

Why Choose Qixing as Your H7N Manufacturer

As an H7N Multi Spring Mechanical Seal manufacturer and factory, Qixing can support product matching and customized selection based on your shaft size, installation dimensions, working medium and operating data. For replacement inquiries, our factory can review dimensional information and photos together with the model reference before quotation. This manufacturer-based workflow helps buyers confirm the requested configuration while keeping the selection grounded in the supplied technical data.

FAQ

What sizes are available for the H7N Multi Spring Mechanical Seal?

The product specifications list H7N sizes from 14 mm to 100 mm shaft diameter.

What are the operating limits of the H7N?

The listed operating range is -20°C to +180°C, pressure up to 2.5 MPa, and sliding speed up to 15 m/s.

What fluids can the H7N be used with?

The product specifications list clean water, sewage water, oil and other moderately corrosive fluids.

Which seat types are available?

The listed standard seat is G9 and the alternative seat is G92.

How do I choose the correct H7N size?

Start with the shaft diameter, then confirm the dimensional requirements and operating conditions against the size table.

Can I use the H7N for a strongly corrosive fluid?

the product specifications only states moderately corrosive fluids. For stronger corrosive media, material compatibility and the complete operating conditions should be confirmed before selection.

What information should I send for an H7N quotation?

Send the required shaft diameter, working medium, operating temperature, pressure, speed and any known seat or material-code requirements. If the inquiry is for replacement, include the existing model reference and available dimensions.

What is the difference between the G9 and G92 options?

The product specifications identify G9 as the standard seat and G92 as an alternative seat. It does not provide a detailed performance comparison, so the correct choice should be confirmed from the installation and dimensional requirements.

Can the H7N material combination be changed for different media?

The product specifications list multiple material codes for the stationary ring, rotary ring, secondary seal, spring and metal parts. The final combination should be selected according to the handled medium and operating conditions.

Is the model number alone enough to order a replacement H7N seal?

Not always. For a more reliable replacement match, confirm the shaft diameter, dimensional data, seat arrangement and operating conditions in addition to the model designation.

For buyers searching for an H7N Multi Spring Mechanical Seal manufacturer, factory or supplier, size and operating-condition matching should be completed before purchase. Qixing can support customized selection by reviewing shaft diameter, medium, pressure, temperature, speed, seat type and available material codes before factory quotation and production confirmation.

H7N Dimension Table

Dimensions are shown in millimeters. Model names below use the Qixing-facing H7N designation.