Single Spring Mechanical Seal

Single Spring Mechanical Seals are widely used across industrial applications. Their simple construction ensures easy installation, dependable sealing and economical performance.

Reliable
Performance

Easy
Installation

Cost
Effective

Long
Service Life

Single Spring Mechanical Seal

Description

Single Spring Mechanical Seal is a compact, reliable, and cost-effective sealing solution designed for a wide range of pumps and rotating equipment. The seal uses a single coil spring to provide uniform face loading and maintains sealing even under varying operating conditions.

It is widely used in water pumps, centrifugal pumps, chemical pumps and general industrial applications where moderate pressure and temperature conditions exist.

Features

Simple and compact design
Single coil spring for uniform face loading
Independent of direction of rotation
Easy to install and maintain
Balanced design for better performance
Wide range of materials to suit various fluids
Reliable sealing with low maintenance

Operating Conditions

Shaft Diameter	10 mm to 100 mm
Pressure	Up to 10 bar (145 psi)
Temperature	-20°C to +180°C
Sliding Velocity	Up to 15 m/s
Axial Movement	± 0.5 mm
Application	Water, Oils, Chemicals, Mild Acids, Alkalis, Slurries and General Fluids

Technical Drawing

Rotary Face

Stationary Face

Secondary Seal

Spring

Metal Parts

Specification

Part	Standard Material
Rotary Face	Carbon / SIC / TC
Stationary Face	Ceramic / SIC / TC
Secondary Seal	NBR / EPDM / FKM / PTFE
Spring	SS 304 / SS 316 / Hastelloy C
Metal Parts	SS 304 / SS 316
Seat Type	Standard / Conical
Balance	Balanced
Direction of Rotation	Independent of Direction
Drive Type	By Spring
Mounting	Pusher / Screw / Set Screw

Dimensional Data (mm)

Shaft Diameter (d)	D1 (H6)	D3 (Max)	D7 (H8)	L1 (±0.5)	L2 (±0.5)	L3 (±0.5)
10	10	20	18	15.0	5.5	20.5
12	12	22	20	15.0	5.5	20.5
16	16	26	24	15.0	5.5	20.5
20	20	30	27	16.5	6.0	22.5
25	25	37	33	17.5	6.5	24.0
30	30	42	38	20.0	7.0	27.0
35	35	47	43	20.0	7.0	27.0
40	40	52	48	22.0	7.5	29.5
45	45	57	53	22.0	7.5	29.5
50	50	62	58	23.5	8.0	31.5