Plenty Mixers – HEAVY DUTY

Plenty has been supplying fluid agitation equipment for over 60 years and, as an engineering company, has been established for over 200 years providing a wealth of engineering experience. Modern manufacturing techniques produce the highest quality equipment, backed by ISO 9001:2000 accreditation. The Plenty TMH mixers are a durable range of side entry mixers with an extensive application portfolio for blending, storage, or homogeneity duties in diverse industries:

TM Belt Driven Mixer (Swivel Angle Heavy-Duty ) (Fixed Angle Heavy-Duty ) Oil Storage High Temp Oil Duties

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A horizontal foot mounted motor is fitted above the main mixer frame on a steel mounting plate which allows adjustment for correct belt tensioning.

Hinge pins and adjusting screws etc. are corrosion protected against atmospheric corrosion. The motor and mixer shafts are connected by a Fire Resistant Anti-Static (FRAS) High Torque Drive (parallel or angle offset) Tooth Belt correctly sized to transmit motor power. Tooth belt for long life and positive engagement between motor and mixer shaft. The pulleys have taper lock bushes for ease of removal and are enclosed in a spark proof and weatherproof guard. Drive service factor is 1.5 minimum.

The main mixer frame is a rigid one-piece casting spigot located to the steel mounting flange and incorporating pre-lubricated, sealed for life, and hermetically sealed shaft bearings. The mounting flange incorporates a single mechanical seal with a corrosion and wear resistant tank shut-off device permitting seal and bearing replacement under full tank conditions.

Plenty is backed by over 60 years operating experience and with a reference list of successful site installations that is second to none, Plenty is acknowledged to be the market leader in the field of side entry mixing technology for the oil and petrochemical industries, s supplying fluid agitation equipment for over 60 years and, as an engineering company, has been established for over 200 years providing a wealth of engineering experience. Modern manufacturing techniques produce the highest quality equipment, backed by ISO 9001:2000 accreditation.

SM Gear Driven Mixer (Swivel Angle Heavy-Duty )(Fixed Angle Heavy-Duty ) Oil Storage High Temp Oil Duties

Driven by a vertical electric motor which is flange mounted on the support bracket above the gearbox and connected by an all metal flexible coupling protected by a guard. The gearbox comprises a single reduction hardened high efficiency spiral bevel gear set having a minimum service factor of 1.5 and are designed to AGMA and DIN Standards. The gears and all bearings are splash oil lubricated and enclosed in a large gear case for maximum heat dissipation. The mixer frame is a rigid one-piece iron casting with spigot located on the gearbox and the steel mounting flange. Gear driven mixers are available in both fixed angle and swivel angle models.

SM Gear Driven Mixer (Swivel Angle Heavy-Duty )(Fixed Angle Heavy-Duty ) Oil Storage High Temp Oil Duties

Driven by a vertical electric motor which is flange mounted on the support bracket above the gearbox and connected by an all metal flexible coupling protected by a guard. The gearbox comprises a single reduction hardened high efficiency spiral bevel gear set having a minimum service factor of 1.5 and are designed to AGMA and DIN Standards. The gears and all bearings are splash oil lubricated and enclosed in a large gear case for maximum heat dissipation. The mixer frame is a rigid one-piece iron casting with spigot located on the gearbox and the steel mounting flange. Gear driven mixers are available in both fixed angle and swivel angle models.

Unique Positive Tank Shut-Off Device

All units incorporate a tank shut-off device to allow the shaft seal and bearings to be changed under full tank conditions. The tank shut-off mechanism incorporates tapered metal to metal faces, positively clamped by a bolted flange which both seals products in the tank and securely supports the shaft during bearing and/or shaft seal changes.

All tapered faces are wear and corrosion resistant. The most important aspect of the Plenty Shut-off and mechanical seal assembly is that it incorporates a safety check valve for ensuring that the shut-off is 100% effective before removal of any bearings or the mechanical seal. The Plenty shut-off mechanism offers complete safety and security as it does not incorporate any flexible ‘O’ rings or gaskets which may deform, wear, or perish.

IMPELLERS

The high efficiency true helical pitch impeller with forward rake was originally developed by Plenty for Side Entry mixers. Years of research in the field of liquid dynamics have been rewarded by a technically advanced design of impeller, having a large blade area that provides the optimum cavitation-free suction conditions promoting maximum pumping rate and entrainment for any installed power. Each impeller is accurately cast as a one-piece component, thus eliminating the setting variances and welding problems often present with alternative fabricated designs. Rigid inspections of pitch, uniformity and balancing ensure minimal vibration and optimum pumping efficiency.

Advanced Impeller Design:

  • High pumping
  • High thrust
  • Minimum power draw
  • High Thrust
  • No Cavitation
  • Reliability

Standard Materials of Construction

  • Impeller
  • Cast Iron
  • Shaft
  • Carbon Steel
  • Mounting flange
  • Carbon Steel

Impeller Fixing

Positive fixing and driving of the impeller on the shaft is achieved by the use of taper to taper shaft connection with side fitting key and retaining bolt.

BEARINGS In every case the units are designed and manufactured to require minimum maintenance. The mixer bearings in particular have been engineered to provide long life and to maximize bearing L10 Life.

Why Side Entry Tank Mixers?

 

The Plenty Side Entry mixer is the most efficient converter of energy into fluid motion.

Unlike jet mixer systems, they do not suffer significant energy losses at the pump, in the pipework, in the bends, or most significantly, at the jet nozzles. Also, capital costs are lower and access to in tank components is not restricted, while the problem of frequent, urgent maintenance on tanks that must be emptied and cleaned, is eliminated.

Side Entry mixers are also more efficient than top entry mixers, and are significantly less expensive for larger diameter tanks. Side Entry mixers are ideal for use on tanks with floating roofs where practical considerations preclude the use of top entry mixers.

Optional Design Features

  • Seal leakage detector
  • Bearing probe wear monitoring unit
  • Special mechanical seals
  • Hand operated swivel actuator
  • Automatic swivel actuator
  • Vibration detectors

Options

Actuators

The use of either swivel actuator allows for efficient cleaning of the tank bottom and eliminates the need for routine manual adjustment. Actuators are available for both gear and belt driven mixers. As an alternative to this manual facility, an automatic swivel actuator can be supplied as an optional extra.

The Automatic Swivel Actuator is a shaft belt driven or an electric motor driven speed reducer and linkage, which allows the mixer to swivel 30 degrees in either direction.

Using the shaft driven actuator provides constant motion of the swivel while the mixer is in operation. This option removes the need for expensive additional field wiring.

With the electric motor driven actuator the timer controller provided will cycle every 24 hours and swivel the mixer 10 degrees each time. This allows for efficient cleaning of the tank bottom and eliminates the need for routine manual adjustment.

TANK MOUNTING MANHOLE – FIXED AND SWIVEL

The most common sizes of tank adaptor flanges to suit ANSI and API standard 24” and 30” are available as standard. Tank adaptor flanges can be supplied to suit all tank manhole/ nozzle fixings.

The swivel assembly comprises a stainless steel polished spherical ball attached to the mixer mounting flange and sealed by a Viton SoloseleTM which prevents leakage while the mixer is swiveled in a horizontal plane through 60° (30° either side of a line through the mixer centerline). The mixer is supported by robust hinge pins and is provided with a positive clamping arrangement for locking the mixer in positions of 10° intervals.

Seal Leakage Detection

The Plenty standard seal leakage detection system provides an economical solution to alert the operator of leakage passed the mechanical seal. Any leakage is collected and contained within a collection vessel that is equipped with a level sensor that can activate an alarm in the control room.

Other leakage detection systems can be supplied to meet API Plan 65 and Plan 75 if required.

The leakage system can be mounted to a fixed or a swivel angle mixer or can be mounted on the floor near to the mixer

Mechanical Seal

The mechanical seal was developed in conjunction with a leading manufacturer for use in the Petrochemical field on fluids from asphalt to xylene. The mechanical seal is completely enclosed inside a housing which is fitted with a close clearance throttle bush outboard of the mechanical seal to restrict leakage rate of tank media in the event of ultimate seal failure. A safety check valve is fitted for venting the seal chamber to ensure that it is completely filled with liquid prior to start-up as well as to check that the shut-off device is 100% effective.

Plenty Light Mixers

Plenty TMH Mixers are compact and durable, providing wide process flexibility with assured results. Design specifically for the oil storage, vegetable and alcohol industries.

  • Fixed angle for blending, homogeneity, or temperature uniformity
  • Choice of single mechanical seals available to suit customer product needs with CvSiCor SiCvSiCoptions.
  • Bearing and seal replacement are possible under full tank conditions using the tank shut off device. The shut off device is hard solid metal to metal contact and is integral to the shaft design avoiding o’ringsor heat affected weld areas.
  • High efficiency impellers for optimum mixing and power savings
  • All 316 stainless steel wetted parts construction
  • Maintenance-free bearings
  • Bearing system minimizes seal deflection
  • L10 bearing life in excess of 65,000 hours
  • Single sleeve mounted mechanical seal
  • 4” ANSI mounting flange
  • Power range 1.1 – 5.5 kW / 1.5 – 7.5HP
  • CE & ATEX 2 G / ATEX 3 G certification available
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