1A Rubber Bellow Mechanical Seal

The 1A Rubber Bellow Mechanical Seal is available with a detailed inch-size range from 0.375 in. to 4.000 in. and a metric reference range from 14 mm to 100 mm. Buyers can start an RFQ from either an inch or metric shaft size, then confirm the installation dimensions before production.

Instead of treating the 1A as only a model name, Qixing can use the shaft size, D3/D6/D7 dimensions and L3/L4 axial dimensions to match the existing seal or equipment drawing.

Technical Specifications

What Is Different About the 1A Data Set

The 1A dimensional set includes D6 in addition to D3 and D7. Together with d, L3 and L4, these dimensions provide a more detailed basis for replacement checking and installation matching.

A separate metric reference table provides d, D3 and L3 values, making the 1A easy to specify for buyers working with metric shaft sizes.

Material Code Options

• Stationary ring: V1 / Q1 / Q2 / U2 / U1
• Rotary ring: B / A / U2 / Q2 / Q1 / U1
• Secondary seal: P / E / V
• Spring and metal parts: F / G

Material selections are specified by codes. If the required code is not known, provide the medium and duty conditions so Qixing can review a suitable combination.

Application and Duty Review

The 1A is suitable for clean water, sewage water, oil and other moderately corrosive fluids. For special media, confirm the actual chemical composition and operating conditions before final material selection.

When the medium contains solids, additives or corrosive components, include the actual fluid details and temperature in the inquiry so the seal configuration can be reviewed against the real duty.

Inch or Metric? How to Start the RFQ

Replacement Matching Checklist

• Identify whether the existing seal was selected by an inch or metric shaft size.
• Measure shaft diameter d accurately rather than relying only on a worn model marking.
• Record D3, D6 and D7 where accessible.
• Record L3 and L4 for axial fit.
• Take clear photos of the complete rotating assembly and stationary seat.
• Provide medium, temperature, pressure and speed.
• Send any known material codes or equipment drawing references.

Ordering Note

For the 1.375 in. size, please confirm the D6 dimension with Qixing before ordering.

Why Choose Qixing for 1A

Qixing, the mechanical seal brand of Ningbo Yade Fluid Connector Co.,Ltd, manufactures and supplies mechanical seals for industrial buyers. For the 1A, our factory can work from inch or metric size references, samples, drawings and measured installation dimensions to support OEM and replacement projects.

The purchasing process is straightforward: identify the size system, verify the critical dimensions, confirm the duty conditions and then finalize the material and production requirements.

Frequently Asked Questions

What size range is listed for the 1A Rubber Bellow Mechanical Seal?

The inch table runs from 0.375 in. to 4.000 in. The separate metric reference table lists shaft sizes from 14 mm to 100 mm.

What operating limits are shown for the 1A?

The operating range is -20°C to +120°C, with pressure up to 1.4 MPa and sliding speed up to 15 m/s.

What media are listed?

Clean water, sewage water, oil and other moderately corrosive fluids.

Which dimensions are published for the inch sizes?

Key inch-size dimensions include d, D3, D6, D7, L3 and L4.

What does the metric reference table provide?

It provides metric size, d, D3 and L3 values for 14-100 mm reference sizes.

Can I use the metric table alone for a replacement order?

It is a useful starting point, but the actual installation dimensions should still be confirmed before production.

What material codes are listed?

Stationary ring: V1/Q1/Q2/U2/U1; rotary ring: B/A/U2/Q2/Q1/U1; secondary seal: P/E/V; spring and metal parts: F/G.

Why is the 1.375 in. row flagged for checking?

Please confirm the D6 dimension for the 1.375 in. size before production.

What should I send to Qixing for a replacement quote?

Send the inch or metric shaft size, D3/D6/D7/L3/L4 dimensions where available, operating medium, temperature, pressure, speed and old-seal photos.

Can Qixing manufacture customized 1A seals?

Qixing can review OEM and replacement requirements using samples, drawings, measurements and operating data.

1A Inch-Size Dimension Table

Dimensions are in millimeters except the first column, which is the inch-size reference.

Ordering note: please confirm the D6 dimension for the 1.375 in. size before production.

1A Metric Reference Table