With experience SINCE 1945 in commercial and industrial blending, Hayes & Stolz has acquired and developed the skills necessary to manufacture Continuous Blenders with the appropriate finish for the intended application. Our DA (Pug Mill), SA, L56 and E-Z Blenders can be designed and manufactured for stainless/sanitary/food grade applications.
The following descriptions for standard finishes are from the "Hayes & Stolz Procedures for the Manufacture and Finishing of Stainless Steel Equipment". For a detailed description of each standard finish see the Technical Documents section of this web-site. While these procedures address the standards adopted by Hayes & Stolz, they are not intended to limit our ability or willingness to provide a custom finish to a customer’s own specification.
Used primarily when “sanitary construction” is specified for food, chemical and pharmaceutical industries requiring stainless steel product contact surfaces and a finish with no cracks or crevices and a high degree of interior polish. Interior is polished to 120 grit final finish.
Used primarily when “sanitary construction” is specified for food, chemical and pharmaceutical industries requiring stainless steel product contact surfaces and a finish with no cracks or crevices, but not requiring the highest degree of interior polish. Interior is polished to 80 grit final finish.
Used primarily when “stainless steel construction” is specified. Commercial design shall be the same as for standard carbon steel units for non-sanitary applications. Interior and exterior finish shall be as-fabricated. The exterior of SSC-II equipment will not be painted.
Used primarily when “stainless steel product contact surfaces” is specified. Commercial design shall be the same as for standard carbon steel units for non-sanitary applications. Interior and exterior finish shall be as-fabricated. The exterior of SSC-I equipment will be painted.
In addition to the stainless/sanitary/food grade applications Hayes & Stolz offers options for several special duty applications:
For applications involving abrasive products, H&S Continuous Blenders can be designed to incorporate abrasion-resistant paddles and critical wear areas. The paddle tips (and leading edges of ribbons on E-Z Blenders) can also be hard-faced with a welded overlay.
E-Z Blenders used to blend “sticky” ingredients can be furnished with UHMW liners on the u-trough housing, shaft, cross-arms and paddle faces for easier release. (Illustrated in photo to the left.)
For u-trough style blenders (DA, SA and E-Z Blenders) covers are provided for protection required by OSHA from the moving parts and for a means to contain/control dust from the blending process. They can also be designed to include ports for dry and/or liquid ingredient addition, dust pick-up ports, and access for inspection and cleaning. H&S blender covers can be custom designed to allow for the best integration with the customer’s operation.
For processes that require the addition of liquids, Hayes & Stolz can provide liquid injectors, manifolds and/or spray nozzles. The type and location for liquid addition will be determined for optimum performance for the application.
Hayes & Stolz offers a variety of seal options for the main shaft penetrations through the end plates. The selection of seals that are properly suited for the blending application is important in order to minimize leakage and reduce premature shaft wear that results in expensive repairs and down time.
The H & S Split Block Seal, for dry blending in commercial (non-sanitary) applications, consists of a UHMW body, steel front and back plates and two wraps of ½" braided teflon packing. The split design allows for easy disassembly for cleaning and maintenance.
The H & S Flanged Gland Seal, for dry blending in commercial (non-sanitary) applications, consists of a steel body, steel back plate and one wrap of ½" braided teflon packing. Construction materials can be mild steel or stainless steel. The split design allows for easy disassembly for cleaning and maintenance. The body acts as a plunger against the braided packing material allowing for some adjustment as the packing wears.
The H & S Packing Gland Seal (with or without air purge) is designed for dry, slurry or wet blending in commercial or sanitary applications. The housing and plunger are available of machined stainless steel or UHMW with stainless steel front plate, back plate and pusher plate. For dry applications the seal comes standard with multiple wraps of ½" braided teflon packing. Stacked v-rings are used for liquid applications. The split design allows for easy disassembly for cleaning and maintenance. The plunger design allows for adjustment as the packing material wears.
Hayes & Stolz has extensive knowledge of numerous blending applications for many industries and is uniquely qualified to recommend the right features and options to enhance the performance of our blenders and improve blending productivity.
Heating and Cooling Jackets
Hayes & Stolz blenders can be furnished with heating/cooling coils or with insulation and steel jackets to satisfy temperature-sensitive blending applications. Coils can be used with heated water or low-pressure steam for heating, or with chilled water or ambient water for cooling. Jacketed blenders can be furnished with blanket type insulation or spray insulation and with bolted or fully welded jackets. Coils and jackets are available on commercial or stainless/sanitary/food grade blenders.
Lifting bars are steel bars added to the ribbons of EZ Blenders parallel to the main shaft to introduce a tumbling action to the product being blended. They are recommended for blending applications for liquid, slurry or low-density products, and can be added to commercial or sanitary (food grade) blenders.
Support Structures and Platforms
The installation of a blending line sometimes requires a support structure to elevate the blender to clear other equipment, or a work platform around the blender for maintenance or to hand-add ingredients. Hayes & Stolz has the engineering and manufacturing expertise to help with the design of structures or to manufacture to a customer’s design. Platforms are designed and manufactured with OSHA compliant handrails and with ladders or stairs as required. All structures and platforms are custom designed to the installation requirements.