GRACO Sanitary Bin Evacuation Unloader System

GRACO SaniForce Bin Evacuation Unloader System, designed for high-viscosity food products. It utilizes a piston pump coupled with a pneumatic pressure plate, replacing manual scooping, tilting, or conventional low-efficiency unloading pumps. The system can unload materials from 300-gallon containers, handling viscosities up to 2,000,000 cps, with a material evacuation rate of up to 99%.

Brand:	GRACO
Application:	Tote Unloader
Handling Viscosity:	2,000,000 cps
Material Evacuation Rate:	99%
Number of Pumps:	2 or 4 units
Pump Type:	Hygienic piston pump / diaphragm pump
Interface Control:	Enclosed pneumatic / electro-pneumatic

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Catalog Manual Repair Manual

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Achieve up to 99% Evacuation Rate for Medium-to-High Viscosity Products

Designed specifically for the high-efficiency, sanitary unloading of viscous fluids, the system employs Piston Pumps and an air-powered ram plate equipped with an Inflatable Seal. This configuration ensures the steady extrusion of material within a sealed environment, achieving an evacuation rate of up to 99%. Automated operation further enhances safety and efficiency while significantly reducing waste and ensuring optimal hygiene.

Handles Materials Up to 2,000,000 cP Viscosity

The SaniForce BES Unloading System is engineered to handle materials with a viscosity of up to 2,000,000 cps. In the Food and Beverage sector, this system is ideally suited for viscous products such as tomato paste, peanut butter, icing and frosting, jams and jellies, caramel, and corn syrup. Furthermore, it is also applicable to the personal care and other industries, efficiently handling high-viscosity products like toothpaste and cosmetics.

Inflatable Seal Prevents Bacterial Contamination

A tight seal is established between the ram plate and the inner container surface via the Inflatable Seal. This design prevents airborne bacteria and contaminants from entering, while simultaneously eliminating the crevices and fasteners associated with traditional wiper seals.

Enhanced Operational Safety and Positioning Accuracy

The inclusion of bin guides and a back stop ensures the precise positioning of the tote. Furthermore, a pneumatic safety circuit is engineered to prevent the loss of air pressure in the cylinders, thereby guaranteeing safe and stable operation.

Intelligent Control System Supports Flexible Automated Operation

The BES Unloading System offers two control options to meet varying process and budget requirements:：
▪️Enclosed Pneumatic Control:
Fully pneumatic, requiring no AC power. Operators manually control the pump, ram plate, and seal inflation via knobs and switches—ideal for basic applications without data traceability.
▪️Electro-Pneumatic Control:
Combines electronic and pneumatic operation, requiring AC power. Features a touchscreen interface and supports automated unloading, recipe management, batch processing, and data logging.

Modular System Design: Configurable with Two or Four Pumps

The SaniForce Tote Unloading System (BES) features a highly modular design. At the time of ordering, customers can choose to purchase and configure the system with either a two-pump or a four-pump system, based on their specific production requirements. This flexibility ensures stable evacuation efficiency for both mid-sized and large-scale production operations. Furthermore, the modular structure allows for quick pump disassembly, making it an ideal choice for applications that require frequent sanitary cleaning.

Diverse Pump Options

For pump selection, customers can choose the most suitable pump based on the viscosity and flow rate requirements of different fluids. Options include high-pressure Piston Pumps for high-viscosity materials, or highly efficient SaniForce Diaphragm Pumps.

Specifications

The SaniForce Drum Unloading System features a modular design composed of three key components: the Frame, Pump Module, and Plate & Seal assembly. Using the modular code system, components can be selected to configure the most suitable SaniForce drum unloading system.
Example Selection: Configuration Code – STU A02BAB2AA0C21
This code represents the following selections: Frame A + Pump 02 + Plate Size B + Seal Type A + Seal Material B + Controls 2 + Accessories AA + Wash Kit 0 + Certification C21. Please refer below for the step-by-step selection process and code definitions.

Step 1: Select Frame and Pump

Code	Frame	Code	Pump
A	Stainless Steel, Footed	01	5:1 Double Ball , 2 pumps
B	Stainless Steel, Extended Legs	02	5:1 Priming Piston, 2 pumps
C	Stainless Steel, Tall 2-Gate	03	12:1 Priming Piston, 2 pumps
		04	5:1 Double Ball, 4 pumps
		05	5:1 Priming Piston, 4 pumps
		06	12:1 Priming Piston, 4 pumps
		07	3250 HS Ball Check, AODD (P.SSPTPO), 2 pumps
		12	3250 HS Ball Check, AODD (P.SSFKEO), 2 pumps
		13	3250 HS Ball Check, AODD (P.SSPTPS), 2 pumps
		14	3250 HS Ball Check, AODD (P.SSSPSP), 2 pumps

Step 2: Select Drum Size and Seal Configuration

Code	Plate Size	Code	Seal Type	Code	Seal Material
A	44.375×40.375 (plywood)	A	Inflatable	A	Polychloroprene(White)
B	43.9×39.9 (Buckhorn 315 / Schoeller 315)	0	None	B	EPDM(Black)
C	55.5×42 (Goodpack)			0	None
D	43.375×35.625 (TNT)
E	43.5×40.375 (Arena)
F	41.32×38.9 (Ceva/Pallecon)
G	43.1×36.4 (Spacekraft)
J	43.9×39.9 (Citadel)
K	35×25 (Submersible)
L	45.5×41.0 (Goodpack MB6)

Step 3: Select Control System and Additional Accessories

Code	Controls	Code	Accessories	Code	Wash Kit	Code	Certification
1	Enclosed Pneumatic	AA	Bag Clamp Corner Guide Kit	0	None	C21	EN 10204 type 2.1
2	Electro-pneumatic	0	None	1	Poly Tank Kit	C31	EN 10204 type 3.1

Technical Information

Control Panel

Enclosed Pneumatic Control

Please refer to pages 18–22 of the product manual.

Electro-Pneumatic Control

Please refer to pages 23–24 of the product manual.

Pump Model and Corresponding Pressure

Code	Pump	Max Pump Air Inlet Pressure PSI (MPa, bar)	Max Working Fluid Pressure PSI (MPa, bar)	Max System Air Consumption scfm (m³/min)	Max Control Air Inlet Pressure PSI (MPa, bar)
01	5:1 Double Ball	80 (0.55, 5.5)	410 (2.83, 28.3)	140 (3.9)	100 (0.69, 6.9)
02	5:1 Priming Piston	80 (0.55, 5.5)	410 (2.83, 28.3)	140 (3.9)
03	12:1 Priming Piston	100 (0.69, 6.9)	1450 (10.0, 100)	240 (6.8)
04	5:1 Double Ball	80 (0.55, 5.5)	410 (2.83, 28.3)	140 (3.9)
05	5:1 Priming Piston	80 (0.55, 5.5)	410 (2.83, 28.3)	140 (3.9)
06	12:1 Priming Piston	100 (0.69, 6.9)	1450 (10.0, 100)	240 (6.8)
07	3250 HS Ball Check, AODD (P.SSPTPO)	100 (0.69, 6.9)	100 (0.69, 6.9)	225 (6.3)
12	3250 HS Ball Check, AODD (P.SSFKEO)
13	3250 HS Ball Check, AODD (P.SSPTPS)
14	3250 HS Ball Check, AODD (P.SSSPSP)

BES Operation Principle

BES Demonstration Video

About GRACO

GRACO Inc. (GGG. US) is a publicly traded American company founded in 1926 in Minnesota, specializing in the design and manufacture of high-quality pumps, spray equipment, and fluid control systems. With a wide range of applications from industrial manufacturing, construction painting, and automotive repair to everyday consumer markets, GRACO offers flexible, technology-driven solutions for diverse industries. Guided by its commitment to "Continuous Innovation, Superior Quality, Customer First," GRACO is dedicated to providing reliable fluid management solutions, earning the trust and recognition of customers worldwide through its engineering expertise and relentless innovation.

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