H74-D series mechanical seals are widely used, with strong interchangeability, compact structure and easy installation. The push ring is mainly stuck by the transmission tower to prevent the spring from falling off. Reliable performance, widely used in petrochemical pumps. H refers to the balanced mechanical seal. As the name implies, the H7 series of mechanical seals are generally used under high pressure conditions. D refers to the double-end structure, which is generally suitable for crystallizing, granular and fibrous media. 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 H74-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 elastic failure. Generally applicable to the conditions containing solid particles. The elastic compensation element of H74-D series mechanical seals can be optionally installed with small springs. The elastic source side is exerted by many small springs together, and its advantage is that the sealing surface is stressed evenly. The F of H74F-D series mechanical seal refers to the spiral groove structure of the outer circle processing of the spring seat. Its role is to accelerate the flow of liquid by pumping spiral effect, so as to reduce material accumulation, and is also conducive to the rapid cooling of the seal to prevent premature damage to the sealing surface.

Working parameters

Rules: 14 ~ 200 mm

Pressure force: 4 mpa or less

The temperature: - 50-220 ℃

Wire speed: ≤20m/s

Axial channeling momentum: ±0.5mm

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

balanced

Arbitrary rotation

Multiple spring construction

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).