Double Mechanical Seals ANOD

DOUBLE MECHANICAL SEALS UTD TYPE

CODE 3619-002-25579857-2001

Applied in pump units and equipment where sealed fluids are oil products, liquefied hydrocarbon gases, liquids with harmful chemical agents.

The seals of the second variant of construction are more effective at the operation in the environments, prone to crystallization and polymerization, with a high content of abrasive substances as well as in high-viscosity products.

FEATURES

Leakage of sealed fluid into atmosphere is completely excluded.
First (circuit) friction pair operates at barrier fluid and sealed fluid pressure drop. Second, atmospheric one, - at barrier fluid and air pressure difference.
Barrier fluid pressure is 0,1 - 0,3 MPa greater than sealed fluid pressure.
Mechanical seal retains its operability in case barrier fluid pressure is lower than this one of the medium sealed.
The barrier fluidid can be given as from the outer side of the pair of friction (variant 1) as from the inner part (variant 2).
Pumping is performed according to API682: Plan53 or Plan54.

TECHNICAL PARAMETERS

Shaft diameter, mm	22..260
Shaft rotation speed, rpm	30…4500
Temperature of sealed medium, °C	-60…200
Pressure of sealed medium, MPa	up to 10
Maximum leakage, l/h	0,002
Pressure of sealed medium, MPa (for 2 Variant)	not more 1,6

DOUBLE MECHANICAL SEALS UTD TYPE

TANDEM MECHANICAL SEALS UTT TYPE

TANDEM MECHANICAL SEALS UTT TYPE CODE 3619-003-25579857-2001

Applied in pump units and equipment where sealed fluids are oil products, liquefied hydrocarbon gases, liquids with harmful chemical agents.

Tandem mechanical seals are mostly effective in cases when barrier fluid penetration into pumped fluid is not permitted.

FEATURES

First (circuit) friction pair operates at barrier fluid and sealed fluid pressure drop
Second, atmospheric one, - at barrier fluid and air pressure difference.
Pumping is performed according to API682: Plan 52.
Barrier fluid pressurization by means of gas is not required.

TECHNICAL PARAMETERS

Shaft diameter, mm	22..200
Shaft rotation speed, rpm	30…4500
Temperature of sealed medium, °C	-60…200
Pressure of sealed medium, MPa	up to 10
Maximum leakage, l/h	0,002

BELLOWS TANDEM SEALS

Applied in pump units and equipment where sealed fluids are oil products, liquids with harmful chemical agents, including dissolving rubber, at process operating temperatures from -70 up to 400°С .

The use in conditions of high-abrasive and polymerisable environments is not recommended.

FEATURES

Penetration of barrier fluid into sealed fluid is eliminated.
First (circuit) friction pair operates at barrier fluid and sealed fluid pressure drop. Second, atmospheric one, - at barrier fluid and air pressure difference.
The absence of elastomeric O-rings allows the use the mechanical seals in aggressive, active and hot environments (up to 400°С).
Piping is performed according to API 682: Plan 11/ 52, Plan 11/61/52.

Doble mechanical seals with RADIAL BEARING

They can be used in console pumps to exclude high vibration.

FEATURES

The seal is made according to the drawing of the double mechanical seal.
Radial plain bearing is located between the stages of the seal and operates on the barrier liquid of the mechanical seal.
The rigidity of the shaft is increased because of the reduced size of the console and increased distance between the shaft supports.

Doble mechanical seals with RADIAL BEARING

TECHNICAL PARAMETERS

Shaft diameter, mm	22..200
Shaft rotation speed, rpm	30…4500
Temperature of sealed medium, °C	-60…200
Pressure of sealed medium, MPa	up to 10
Maximum leakage, l/h	0,002

Mechanical seals for reactors and mixers

Mechanical seals for reactors and mixers The sealing module can be composed of mechanical seals of different types, joined with one or several blocks, mentioned above.

TECHNICAL PARAMETERS

Shaft diameter, mm	25...300
Shaft rotation speed, rpm	10…1500
Temperature of sealed medium, °C	-60…400
Pressure of sealed medium, MPa	up to 10

Leakage of sealed fluid into atmosphere is completely excluded.
Parts, contacting medium sealed are made of corrosion-resistant materials.
Friction pair materials used are siliconized graphite, silicon carbide.
The following elastomeric materials are used: materials on the base of fluorine rubber, ethylene-propylene rubber and perfluorinated rubber.
Mechanical seal can be removed without depressuriza-tion of equipment.
Mechanical seal parts protected against corrosive and aggressive working mediums.
Mechanical seal design provides for operational reliability at high temperature and pressure.
Cartridge seal design makes it easy to install.
All seal types for same shaft diameter have completely replaceable components: friction pairs, ring holders, O-rings, springs, force averting devices, drive collars, intake and withdrawal connecting pipes for buffer and cooling fluids.
Bearing block, rigidly connected with the seal, receives significant radial and partly axial loads of the shaft, that allows to apply them on long, flexible, single-shaft machine shafts.
The refrigeration block allows to apply the seal at the temperature of operation environment up to +400°С, providing the necessary temperature at the location of the sealing.
The block of protection from the influence of adhesion and crystallization properties is filled with the liquid compatible with the operation environment neutralizing its adhesion and crystallization properties.
Parking seal block prevents the operation environment from escaping into the atmosphere in case of malfunction of the seal. It allows to replace the mechanical seal without the depressurization of the equipment. The block of protection has an autonomous fastening to the boss of the device and functions at the stopped shaft not depending from the mechanical seal.
Fluoroplastic bellows of original design protects metal components of the seal, that interact with the operation environment.

Double mechanical seal with bearing unit for reactors and mixers