ViscoTwin Pumps Options

The ViscoTwin screw pump provides a range of options that allow adaption to many different situations. Please contact us if your needs are different and the options you are looking for do not appear.

Here is a ViscoTwin 130 G10, featuring a Seal Water Automation Kit and Disengaging Coupler, mounted on Frame #4.

			Displacement		Ball Particle Passing
VT	Pitch	Pump	cc³	gal	mm	inch
70	22	ViscoTwin 70.22	66.0	0.017	11.0	0.43
70	29	ViscoTwin 70.29	86.9	0.023	14.5	0.57
70	43	ViscoTwin 70.43	128.0	0.034	21.5	0.85
104	27	ViscoTwin 104.27	147.2	0.039	13.5	0.53
104	36	ViscoTwin 104.36	194.0	0.051	18.0	0.71
104	53	ViscoTwin 104.53	285.9	0.076	27	1.0
130	33	ViscoTwin 130.33	276.4	0.073	17	0.6
130	44	ViscoTwin 130.44	367.5	0.097	22	0.9
130	65	ViscoTwin 130.65	546.6	0.144	33	1.3

Sanitary Design Practices

ViscoTwin 104 G10 featuring a Seal Water Automation Kit and mounted on a Frame.

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All ViscoTwin pump models are designed to exceed 3A and EHEDG sanitary guidelines. Critical design features such as radii, O-ring grooves, surface treatments, materials, and elastomer selections are engineered to comply with both standards and support hygienic processing.

These design principles ensure easy cleaning, product safety, and reliable operation in demanding sanitary environments such as food, beverage, and personal care production.

Pump Face Options

Pump Size	DIN 11866_C	DIN 11866_A
ViscoTwin 70	2.5” or 3”	DN65 or DN80
ViscoTwin 104	3” or 4”	DN80 or DN100
ViscoTwin 130	4” or 6”	DN100 or DN150

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ViscoTwin pumps offer multiple pump face configurations to match different installation requirements and process layouts. These options allow flexible integration into existing systems while maintaining reliable sealing and long-term performance.

All ViscoTwin spindles are surface hardened to 1200 HV (72 Rockwell) to provide excellent wear resistance and durability. The overall pump construction also complies with OSHA safety guidelines, ensuring safe operation in industrial processing environments.

Pump Housing Options

The G10 Pump Housing was designed to facilitate gentle product flow without damaging particulates. The G10 Pump Housing is also backwards compatible to the G8 on both the 104 and 130 models.

Pump Size	DIN 11866_C	DIN 11866_A
ViscoTwin 70	2.5”	DN65
ViscoTwin 104	3”	DN80
ViscoTwin 130	4”	DN100

Elastomer Options

All available ViscoTwin Elastomer Options are listed in the table below.

Name	Max. Temp	Max. Fat	Temp / Stress
FKM	200°C	50%	medium
EPDM	150°C	8%	medium
PERLAST / V70SW	327°C	100%	high

Spindle Options

Three different spindle pitches are available for each ViscoTwin pump size. Each individual spindle is hardened to 1200 HV with a surface finish of Ra < 0.8 μm.

For high discharge pressures, the smaller pitches are used. Smaller spindle pitches are used to create high discharge pressure. Lower spindle pitches result in less volume/revolution. High discharge pressures are easier to reach with increasing viscosity.

For product with specific particulate sizes, the spindle pitch will determine the minimum pump size. For example, if the particulate requires a cross section of 1″, then the pump would need to be a Model 104.53 or Model 130.65.

Pump Size	E Pitch	H Pitch	N Pitch
ViscoTwin 70	22mm	29mm	43mm
ViscoTwin 104	27mm	36mm	53mm
ViscoTwin 130	33mm	44mm	65mm

Mechanical Seal Options

Different mechanical sealing surfaces and elastomers are available for the ViscoTwin G10 pumps. Material and design are selected based on application.

For easy handling, the ViscoTwin G10 is designed to use a fully assembled cartridge seal to prevent installation errors and damages to the sealing surfaces.

Double Acting Mechanical Seals (DAMS)

ViscoTwin G10 pumps with double acting mechanical seals can run dry as long as the quench media flows through the seal. The quench media lubricates and cools the sealing surfaces whether there is product in the pump or not.

The quench area is located between the inboard sealing surfaces (product area) and the outboard sealing surfaces (atmosphere). The quench media reduces friction between the rotating sealing surface and the static sealing surface. The quench media, in most cases, is city water, single pass. It can be glycerin or vegetable oil recirculated from a quench tank.

Sealing Surface:

Tungsten Carbide knife edge (TC). This surface is ideal, as it is metal detectable.

Frame Options

The ViscoTwin G10 pump is available by itself, or mounted to a custom developed Frame to meet your needs. Whether you need to fit into tight spaces (Frame 6) or gain total mobility (Frame 5), PROCESSTEC offers a solution. The basic design of all pump frames is the lantern, precisely connecting the motor with the pump head. All ViscoTwin G10 Pumps are block mount.

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Features

Visco Twin Lantern

The ViscoTwin Lantern perfectly aligns the Motor to the Pumphead. The sturdy design allows the pump to achieve high RPM’s, and facilitates the use of our Shaft Blocking Tool and Disengaging Coupler.

Shaft Blocking Tool

This tool fits into the ViscoTwin Lantern opening and prevents the Coupler, Spindles and Shafts from rotating while the Pump is under maintenance. This not only SAVES TIME, it increases SAFETY.

Gapping Port

Designed to allow EASY ACCESS to the Gear Synchronization Lock Ring for timing & gapping procedures.

Also allows for the potential installation of various monitoring sensors.

Dual Oil Sight Glasses

Each ViscoTwin Pump includes TWO (2) Oil Sight Glasses, one on each side of the Gear Housing, so that a visual confirmation of oil levels can be easily achieved when space is constrained or limited.

Lifting Hook

Every ViscoTwin Pump includes a Lifting Hook for safe pump handling. This Lifting Hook fully supports the weight of the pump.

Backwards Compatibility (to G8 & WangenTwin)

The ViscoTwin G10 was engineered to have backwards compatibility with the previous generation of ViscoTwin, as well as certain WangenTwin pumps.

Options and Accessories

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Motor Options

ViscoTwin pump motors are optimized to deliver max torque in the 300 to 1200 rpm range at the lowest performance requirement to save cost & complexity.

Above 1200 rpm’s the ViscoTwin pump motor can be used to boost CIP & water, as low viscous media doesn’t require high torque. In order to use the motor at higher rpm’s, the VFD must be set to allow spin over 60 Hz.

Most modern motors from reputable manufacturers can handle the 3600 rpm’s, as the shaft & bearings from 4-pole + motors are typically the same as their 2-pole counterparts.

Description	Speed @ 50Hz	Torque @ 50Hz	Speed @ 60Hz	Torque @ 60Hz
2-Pole Motor	2900 rpm	25 Nm / 18 lb-ft	3500 rpm	20 Nm / 15 lb-ft
4-Pole Motor	1450 rpm	49 Nm / 35 lb-ft	1750 rpm	41 Nm / 30 lb-ft
6-Pole Motor	965 rpm	74 Nm / 55 lb-ft	1166 rpm	61 Nm / 45 lb-ft
8-Pole Motor	725 rpm	99 Nm / 73 lb-ft	875 rpm	82 Nm / 60 lb-ft

Gearmotors

Gearmotors are selected when higher torque is needed at lower power & CIP boosting isn’t required. The general limit on gearboxes for overspeeding is 1.5x to 2x to nominal speed.

The generic rule of thumb is:

The torque value of an electric motor is approximately flat between 30 Hz to 60 Hz. Above 60 Hz, the formulas above apply. Below 25 Hz, the loss in torque needs to be calculated.