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Piston Volumetric

Accutek piston volumetric filling machines are accurate within ± 0.5% when operated as recommended. Piston filler dose size is dependent on product cylinder inner diameter and piston travel distance. On the intake stroke the piston draws product from the supply source through the upper check-valve. On the return stroke the product flows through the lower check-valve to the nozzle.

Best accuracy is achieved by using a long stroke in a smaller cylinder versus a short stroke in a larger diameter cylinder.

The filling speed is affected by these three factors:

 – The piston draw speed depends on product viscosity and stroke length 

 – The piston exhaust speed depends on the nozzle and product characteristics

 – The operator’s experience

O-rings keep product from leaking around the piston as it moves back and forth. The O- rings are placed in grooves around the circumference of the piston head. The O-ring and tubing material must be evaluated for chemical compatibility with the product. The fill temperatures and product abrasiveness will also dictate the elastomer type needed. Some common types of elastomers used are: 

– Fluoroelastomers 

– Buna

– Silicon

– Encapsulated Silicon

– Teflon 

Different types of products require different nozzle designs and sizes. The nozzles used for filling an ampule with 10 ml of thin fluid would not be appropriate for filling a five-gallon can with paint.

Laboratory testing with a number of different types of nozzles is needed to find the type and size nozzle that works best with a particular product. Each product requires a different nozzle configuration. For instance, a bubble forms at the tip of a nozzle when the nozzle diameter is matched to the surface tension of the product. This bubble prevents dripping at the end of a fill. In other cases a screen can be mounted inside a nozzle to prevent foaming. 

Products compatible with SVF fillers

Food

Personal Care

Chemical

Pharmaceutical

Other

Water

Perfumes

Candles

Plasma

Pet Food

Fruit Juices

Essential Oils

Wax

Urine

Pet Shampoo

Fruit Extracts

Nail Polish

Motor Oil

Alcohol

Fertilizers

Tea

Polish Remover

Ink

Iodine

Insect Repellent

Liquid Coffee

Lip Balm

Wood Glue

Saline Solution

Vitamin Drinks

Liquid Soap

Silicone

Medicines

Alcoholic Drinks

Sun Tan Lotion

Paint

Milk

Shampoo

Urethane

Tomato Juice

Hair Conditioner

Grease

Sour Cream

Hand Lotion

Window Cleaner

Salsa

Hair Styling Gels

Carpet Cleaner

Salad Dressing

Makeup Remover

Degreasers

Mayonnaise

Mascara

Stain Removers

Catsup

Eye Liner

Tire Sealant

Mustard

Facial Mud

Detergent

Food Coloring

Personal Lubricants

Syrups

Personal Oils

Cake Icing

Douche & Enemas

Peanut Butter

Tooth Paste

Soup

Mouth Wash

Chili

Bubble Bath

Cheese

Hot Sauce

Yogurt

Fruit Toppings

Jellies

Jams

Honey

Tartar Sauce

Vegetable Oil

Molasses

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