2NT Single Spring Mechanical Seal

The 2NT Single Spring Mechanical Seal is intended for applications where a compact single-end seal and straightforward replacement matching are important. Its 10-28mm shaft size range makes it suitable for smaller pump shafts and equipment where installation space is limited.

For procurement and maintenance work, the key selection points are shaft diameter, seat type, seal-face materials, elastomer choice and the actual operating conditions. Qixing can review these details together with an existing seal sample, drawing or dimensional information before production.

Key Features

• Single-end mechanical seal with O-ring secondary sealing.
• Shaft size range from 10mm to 28mm.
• Operating temperature from -20°C to +180°C, depending on the selected elastomer.
• Maximum operating pressure up to 1 MPa.
• Maximum sliding speed up to 15m/s.
• Standard G9 stationary seat with G6 and G4 alternatives.
• Seal-face options include silicon carbide and tungsten carbide.
• Elastomer options include NBR, EPDM and FKM/Viton.
• Spring and metal-part options in SS304 or SS316.
• Suitable for water, sewage, oil and other moderately corrosive fluid service.

Technical Specifications

Material and Seat Options

The 2NT can be configured with different face, seat, elastomer and metal-part materials. Material selection should be based on the actual fluid, temperature and operating conditions rather than on the model number alone.

• Seal faces: Silicon Carbide (SiC) or Tungsten Carbide (TC).
• Stationary seat materials: Carbon, Silicon Carbide or Tungsten Carbide.
• Elastomers: NBR, EPDM or FKM/Viton.
• Spring and metal parts: SS304 or SS316.
• Standard stationary seat: G9.
• Alternative stationary seats: G6 and G4.

For hot water, oil, chemical or mixed-fluid applications, provide the real fluid composition and operating temperature so the elastomer and seal-face combination can be reviewed before production.

Applications

The 2NT Single Spring Mechanical Seal can be used in pump applications handling clean water, sewage water, oil and other moderately corrosive fluids. Its compact 10-28 mm size range makes it particularly useful for smaller pump shafts and replacement projects where the available installation space is limited.

• Water circulation and transfer pumps.
• General industrial water pumps.
• Sewage and wastewater pumping equipment.
• Oil-handling pump applications within the stated operating range.
• Pump systems handling moderately corrosive fluids after material compatibility is confirmed.

How to Select the Right 2NT Seal

A reliable 2NT selection starts with the equipment rather than the model name alone. Before ordering, confirm the following information:

• Shaft diameter and existing seal size.
• Required stationary seat type: G9, G6 or G4.
• Working medium and chemical composition.
• Normal and maximum operating temperature.
• Operating pressure.
• Shaft or sliding speed.
• Preferred seal-face and elastomer materials, if already specified.
• Photos, sample or drawing of the existing seal for replacement projects.

Replacement Matching

For maintenance replacement, do not rely only on the 2NT model name. Similar mechanical seals can use different seat styles, face materials or installation dimensions. Qixing recommends comparing the old seal and stationary seat before production.

If the existing model marking is incomplete, send clear photos of the rotating assembly and stationary seat together with the shaft diameter and operating conditions. This gives the factory more information for replacement matching and reduces the risk of selecting a visually similar but incompatible seal.

Why Choose Qixing

Qixing, the mechanical seal brand of Ningbo Yade Fluid Connector Co., Ltd, manufactures and supplies mechanical seals for industrial customers. For 2NT requirements, our factory can review standard configurations as well as OEM and replacement projects based on size, material requirements, samples, drawings and operating conditions.

For buyers who are not certain which seat or material combination is required, Qixing can use the application information provided with the inquiry to support configuration review before quotation and production.

Frequently Asked Questions

What shaft sizes are available for the 2NT Single Spring Mechanical Seal?

The 2NT series is available for shaft sizes from 10mm to 28mm.

What is the operating temperature range of the 2NT seal?

The operating temperature range is -20°C to +180°C. The usable temperature also depends on the selected elastomer and the actual fluid.

What is the maximum pressure for the 2NT?

The maximum operating pressure is 1 MPa.

What is the maximum sliding speed?

The maximum sliding speed is 15m/s.

Which stationary seat is standard?

G9 is the standard stationary seat. G6 and G4 are available as alternative seat options.

What elastomer options are available?

NBR, EPDM and FKM/Viton are available options. The correct choice depends on the medium and temperature.

What seal-face materials are available?

Silicon carbide and tungsten carbide are available as seal-face options, with carbon, silicon carbide and tungsten carbide available for the stationary seat.

Can the 2NT be used for sewage water?

Yes, sewage water is within the typical application range. For fluids containing solids or unusual chemicals, provide the actual operating conditions for review.

How do I order a replacement 2NT seal?

Provide the shaft size, seat type, operating medium, temperature, pressure and speed. Photos or a sample of the existing seal are helpful for replacement matching.

Can Qixing support customized 2NT requirements?

Yes. Qixing can review OEM and replacement requirements based on samples, drawings, dimensions and operating data.

Inquiry Information

For quotation and model confirmation, please provide the shaft size, working medium, temperature, pressure, speed, preferred materials and any available photos or drawings of the existing seal.