M74-D series mechanical seals are widely used, with strong interchangeability, compact structure and easy installation. The push ring is mainly clamped by the transmission tower to prevent the spring from falling off. Reliable performance, widely used in petrochemical pumps. M refers to the non-equilibrium mechanical seal. As the name implies, the mechanical seal of M7 series is generally used in the condition of low pressure. D refers to the double-end structure, which is generally suitable for crystallizing, particle containing and fiber medium. It is suitable for use in high temperature occasions, because since it is a double end face structure, then it is necessary to connect the cooling water to the mechanical seal for forced cooling and lubrication. The elastic compensation element of M74-D series mechanical seals can be equipped with an optional waveform spring, which has the advantages of short axial size, strong resistance to blockage, and resistance to elastic failure. Generally applicable to the conditions containing solid particles. The elastic compensation element of M74-D series mechanical seals can be equipped with small springs. The elastic source side is exerted pressure by several small springs together, and its advantage is that the sealing surface is stressed evenly. F in M74F-D series mechanical seal refers to the spiral groove structure of the spring seat cylindrical processing, its role is to use the pumping spiral effect to accelerate the flow of liquid, so as to reduce material accumulation, but also is beneficial to the rapid cooling of the seal to prevent premature damage to the sealing surface.

Working parameters

Rules: 18 ~ 200 mm

Pressure: 2.5 Mpa or less

The temperature: - 50-220 ℃

Wire speed: ≤20m/s

Axial channeling momentum: ±1mm

Material combination

Sealing end face: graphite, silicon carbide, tungsten carbide, alumina

Auxiliary sealing: nitrile rubber, fluorine rubber, ethylene rubber, silicone rubber, PTFE

Metal components: stainless steel, SUS304, SUS316L

The product description

Double face

The balanced

Arbitrary rotation

Comply with EN12756(DIN24960) standards

In the development and design of any product, we follow the principle of installation size standardization. That is, the installation ruler of this type of mechanical seal is in accordance with international and domestic (API610, API682, DIN24960, ISO3069, GB6556).