WillTech is a preferred supplier of ball sealing-plugs and screw-in orifices
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WillTech, a business unit of ScanWill, offers a range of Ball Sealing Plugs manufactured in the USA, as well as a range of Screw-In Threaded Orifices.
The ball sealing-plugs consist of an expanding metal sleeve and a steel ball. The sleeve is designed with several sealing rings, which cut into the bore to be sealed as the ball is driven into the sleeve. The ball sealing-plugs are offered in the materials steel, stainless steel, and aluminium.
The screw-in orifices are offered with several metric threads and with orifice diameters from 0,3 mm to 5,0 mm. The screw-in orifices are made from stainless steel.
For quick, easy, and reliable sealing of cross bores.
The easy, fast, and cost-efficient way to control the flow.
WillTech Ball Sealing Plugs are the perfect solution for sealing off cross bores quickly, easily, and reliably.
Features
Application examples
Materials
The ball sealing plugs are offered in 5 different materials:
Minimum wall thickness and distance from an edge
The radial expansion of the Sealing Plug causes the housing material around the plug to deform plastically. A proper minimum wall thickness, or distance from an edge is necessary to optimize the strength of the mechanical connection. The operating hydraulic pressure, thermal cycling, plug type and characteristics of the base metal must all be considered when determining these values. Please contact us for additional information.
The guidelines for a minimum wall thickness or distance from an edge (Wmin) are expressed below. These minimum values produce only slight deformation on the exterior profile of less than 20µm. This does not affect the performance of the Sealing Plug. Using Wmin values less than those recommended can cause overloading of the base material. This can adversely influence the function of the Sealing Plug. Please contact us for additional information.
Wmin Guideline Values
Sealing Plug Diameter:
· d1 ≥ 4mm: Wmin = fmin * d1
· d1 < 4mm: Wmin = fmin * d1 + 0.5mm
Preparation of the bore to be sealed
The dimensions of the bore to be sealed are shown on the product information sheet for the selected ball sealing plug. The diameter D2 for the for the sealing plug and the diameter D3 for the bore to be sealed are shown with tolerances, which must be kept.
The roundness of the bore D2 for the ball sealing plug must be within 0,05 mm.
The surface finish of the bore D2 must be within Rz 10-30 µm, which is especially important for hard materials. We recommend making the bore D2 with a drill, and to completely avoid a reamer.
In the section Design Guidelines parameters for the position and the recommended wall thicknesses are given.
It is important to avoid any longitude scratchec in the bore D2, as these may result in leakage. The bore must be cleaned, and free from chips, oil etc.
Installation instructions for the Sealing Plugs Series 11, 31 and 33.
Bore Preparation
Ensure the bore is clean and nor chips, grease or oil is present.
Installation Procedure
– Insert the plug into the counterbored hole with the ball facing out, seated against the counterbore shoulder.
– It is important that the correct drill and counterbore size are selected so that the plug is properly supported during installation and a good seal is obtained.
– Press the ball into the sleeve so that the top of the ball is slightly below the top of the sleeve (see FIG. 2 and 3). Approximate values for S (stroke) and X are listed in the table below.
– Be sure to purchase the correct installation tool for each plug size selected.
– The ball plugs can be installed using a hammer and the correct hand installation tool. An arbor or an air hammer with the correct air hammer installation tool can also be used.
– The installation of the ball plugs can also be automated. Feel free to contact us to assist you with your application. Our technical staff would be pleased to help you design and build a custom semi or fully automated installation system. 
The values offered are to be used as a guideline. The base metal chosen for your specific application, the surface treatment, hole size and surface finish all affect seal performance. Please contact us for additional information.
WillTech threaded orifices provide an easy, fast and cost-efficient way to control the flow.
The orifices are extremely easy to use, come in a compact design made from stainless steel W 1.4305, available with M4, M5, M6 and M8 thread. WillTech offers orifices from D0,3 mm to D5,0 mm.
Contact us with any questions or inquiries, and together, we’ll find a solution from WillTech’s wide range of ball sealing plugs and screw-in orifices.
Nicklas Hemmingsen, Global Sales Manager
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