KSB Etaline — a monoblock pump in an “in-line” configuration.

Shaft seal version

• E — External circulation;
• F — External flushing;
• S — Single mechanical seal with a vented chamber and rotating brake;
• V — Single mechanical seal with a vented chamber.

Seal code: single mechanical seal

01 Q1Q1VGG 1 (ZN1181)

06 U3BEGG (shaft assembly 25, 35) RMG13G606

07 Q1Q1EGG 1A (ZN1181)

08 AQ1VGG M32N69

09 U3U3VGG MG13G60

10 Q1Q1X4GG 1 (ZN1181)

11 BQ1EGG-WA (WA = drinking water) 1 (ZN1181)

22 AQ1EGG (shaft kit 55) M32N69

66 Q7Q7EGG MG13G6

67 Q6Q6X4GG MG13G60 / MG1G61S6

List of recommended seals for specific media

The Salvatore Robuschi RB (RBB-RBL-RBM) pumps are centrifugal pumps with a channel impeller designed according to ISO 5199 standards.

Various types of mechanical seals are used in these pumps in different configurations. The cylindrical seal chamber is built in accordance with EN 12756 standards. Single mechanical seals, double mechanical seals (tandem or back-to-back), or packing seals — all these configurations can be modified by the user using the same casing cover, replacing only a few parts. The pumps can also be equipped with flushing systems compliant with API 682 standards (such as PLAN 11, PLAN 52, PLAN 53, PLAN 54).

In this case, the pump uses a type C sealing system — that is, a double mechanical seal in a back-to-back configuration.

Shaft diameters for:

• Group 2 (RBB 65-20, 80-20, 80-25, 100-25, 125-25) — 43 mm
• Group 3 (RBB 80-31, 125-31, 125-40, 150-31) — 53 mm
• Group 4 (RBB 150-35, 200-35, 250-35) — 70 mm
• Group 5 (RBB 200-45, 250-45, 300-45, 300-46) — 90 mm
• Group 6 (RBB 400-60) — 100 mm

The flushing pressure should be 0.5 bar higher than the working medium pressure.

Wilo FA08.64E + FK17.1- 4/16K SN: 650217596 – a submersible pump for wastewater removal (including fecal matter and long-fibered and solid inclusions) used in water management, agriculture, construction, and industrial sectors, for water intake from rivers, reservoirs, and tanks.

Seal for the liquid and motor chamber type "K": cartridge double seal with friction pairs on both the motor side and the medium side – SiC/SiC. Rubber elements – NBR or Viton.

We used position 34 to replace the mechanical seal
6074592 shaft sealing H35/2 VP (alternative 6075005 shaft sealing H35/2 1.4462 VP) R-TSWE 35, A, SIC/SIC/SIC/SIC, VITON, 304.

The motor and seal chamber are filled with biologically inert white oil. For oil replacement, the following brands are recommended:

• Aral Autin PL*
• Shell ONDINA 919
• Esso MARCOL 52* or 82*
• BP WHITEMORE WOM 14*
• Texaco Pharmaceutical 30* or 40*

All oil brands marked with "*" are approved for contact with food products.

BTS Engineering mechanical seals ensure reliable and uninterrupted operation of the Wilo EMU FA pump.

MATRA S.p.a is a company that manufactures electric pumps: surface, borehole, and submersible, as well as pumping systems, including those for fire protection.

The company has been present on the international market for over 50 years. Its headquarters are located in Nonantola (MO), and the production plant is in Modena.

MATRA Spa is certified according to the UNI EN ISO 9001:2008 quality management system.

MATRA CM50-160A is a single-impeller centrifugal pump with a casing manufactured according to EN 733, designed for pumping clean water and chemically non-aggressive liquids without solid particles. It can be installed in any position, except with the inlet port facing upward, which — along with its special construction — makes it simple and convenient to use in many areas: domestic, industrial, agricultural, etc. It comes standard with a counterflange.

Mechanical seal — ceramic/graphite

Pumps for industrial commercial swimming pools from the Spanish manufacturer Kripsol, MARFIL series MRF1500A 1500 rpm are centrifugal pumps with mixed flow, suitable for the drainage and pre-filtration of large volumes of water at low pressure. The pump housing and pre-filter housing are made of grey cast iron GG-25, the impellers are bronze, and the motor is protected to IP 55 standard, class F.

Considering the operating conditions of Kripsol MRF1500A pumps (exposure to chlorine, peroxide, mineral salts, etc.), we have installed a mechanical seal R-BT-FN 35, SIC/SIC, VITON.

The chemical cantilever pump type X is designed for pumping chemically active and neutral liquids at temperatures ranging from 233 to 393 K (from -40 to +120°C).

The type X pump is a centrifugal, horizontal, single-stage pump with a casing-mounted bearing. The shaft seal of the pump is either a double mechanical seal or a gland packing.

In our case, the X100-80-160 pump is used for pumping ammonia, and a gland packing was used as the sealing method.

It is well known that a double mechanical seal offers several advantages over gland packing (reduced leakage of the pumped liquid, preservation of pump performance, and reduced maintenance costs).

The double mechanical seal was installed as follows, using two mechanical seals R-MG1:

Technical specifications

• Allowable radial runout – no more than 100 µm.
• Misalignment between chamber and shaft – no more than 0.2 mm.
• Coolant pressure in the chamber Pk = Pw (working pressure in the tank) + 10%.

To lubricate and cool the sealing surfaces, a barrier liquid (technical water, antifreeze) is used under a pressure that exceeds the working medium pressure by 0.1 to 0.2 MPa. In case of leakage, the barrier fluid enters the product.

Characteristics of the Ebara 3U-32-200NB-184JM centrifugal pump:

• monoblock design, all components of the flow part are made of stainless steel, both horizontal and vertical installation.

These pumps use high-quality mechanical seals in a variety of designs to suit the conditions of use.

Application:

• Increasing pressure
• Agriculture
• Water supply systems
• Water purification and reclamation
• Air conditioning systems

Mechanical seals with metal bellows are high-tech devices that are widely used in various industries due to their reliability, durability and ability to operate in difficult conditions.

Under extreme temperature conditions (-117°C to 425°C / 800°F), the dynamic rubber elements of mechanical seals will be subject to premature aging. To solve this problem, mechanical seals with a welded metal bellows are used. Seals with a metal bellows do not require the use of additional springs - the metal bellows itself simultaneously transmits the torque to the rotating ring and at the same time presses this ring against the stationary one.

The design of a welded metal bellows seal is usually balanced, so the seal can operate at pressures up to 7 MPa (depending also on the choice of thickness and number of layers of the wave plate). These seals are independent of the direction of rotation of the shaft.

Areas of application include areas with difficult operating conditions: hot hydrocarbons, aqueous solutions, chemical and petrochemical industries, heat transfer fluids, alkalis, acids.

However, the cost of manufacturing these mechanical seals is relatively high, but this is fully offset by the increased service life compared to a conventional seal.

They are made by turning from pure Teflon (PTFE, PTFE) or Teflon filled with glass fibre, carbon fibre, bronze. This manufacturing method allows us to produce cuffs with diameters ranging from 4 mm to 1500 mm.

With the correct selection of the O-ring, the operating temperature of use is -60/+200 °C.

What are PTFE rotary seals?

Rotary seals made of PTFE (polytetrafluoroethylene) are specialised sealing elements used to ensure the tightness of rotating shafts in various machinery. PTFE is a material with unique properties such as:

• High chemical resistance: PTFE does not react with most chemicals, making it ideal for use in aggressive environments.
• Low friction: This allows you to reduce the wear of parts and increase the service life of the seal.
• Wide range of operating temperatures: PTFE is resistant to both low and high temperatures.
• Electrical isolation: Prevents the occurrence of electrical discharges.

Application

PTFE rotary seals are widely used in a variety of industries:

• Oil and gas industry: for sealing pumps, compressors, valves.
• Chemical industry: for equipment working with aggressive environments.
• Pharmaceutical industry: for the production of medicines.
• Food industry: for equipment in contact with food products.
• Mechanical engineering: for various types of industrial pumps and compressors.

Advantages of PTFE rotary seals:

• High reliability and durability.
• Low operating costs.
• Ability to work in extreme conditions.
• A wide range of sizes and designs.

Choice of PTFE rotary seal

The following factors must be considered when selecting a PTFE rotary seal:

• Working environment: Pressure, temperature, chemical aggressiveness.
• Speed of shaft rotation.
• Permissible leaks.
• Overall dimensions.

By contacting BTS Engineering, you will be able to solve any problem of choosing high-quality cuffs for hydraulics and pneumatics.

The robust and reliable design of Grindex Maxi H drainage pumps (Sweden) makes these pumps ideal for drainage in the most difficult conditions - in industrial construction, in the mining industry, for removing large volumes of liquid from treatment plants, with a maximum size of solid abrasive particles of up to 12 mm.

I use two shaft seals in this pump - upper and lower, which contributes to reliable protection against leaks.

We have replaced the mechanical seals of the Grindex Maxi H pump 8107.011-0013 1741187 A-337 84 00 with the mechanical seals R-FL.NU 45, TC/TC, VITON, 304 and R-FL.NL 35, TC/TC, VITON, 304 (132 382 and 51 896 52). The shaft seals operate in an oil chamber, tungsten carbide on tungsten carbide friction pairs are used, rubber elements are Viton.

If you need high-quality mechanical seals for Grindex Maxi H, don't hesitate to contact BTS Engineering!