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Valve Cones

William Johnston & Company Limited have been involved with the manufacture and supply of WRC/WRAS approved EPDM valve cones for several years. Valve cones are an approved method of sealing potable water valves where a conventional braided stuffing box packing has been previously used.

Easy and quick to install the range offered will suit all sizes of valve listed in the table below. The company is ISO approved for quality within manufacture and maintains ongoing quality checks to maintain its reputation as one of the leaders in the gasket and sealing industry. These cost effective seals are quicker to install and last longer than a conventional packing.

Valve cone selection

Valve stem diameter Shaft/stuffing box diameter
25mm 1” 43mm 1 ¾” No 6
28mm 1 1/16” 50mm 2” No 8
31mm 1 ¼” 55mm 2 3/16” No 10
34mm 1 3/8” 60mm 2 3/8” No 12
38mm 1 ½” 63mm 2 ½” No 14
40mm 1 9/16” 65mm 2 9/16” No 16
44mm 1 ¾” 69mm 2 5/8” No 18

The valve stem diameter should be identical to the measurement given. The shaft or stuffing box diameter should be equal to or less than the measurement indicated above.

Contact William Johnston & Company Limited for further information on this and other products that can assist in reducing installation time and expense.

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Contact William Johnston & Company Limited

For more information about our Valve Cones products that are available world wide, contact us on +44 (0)141 620 1666, Email us or simply complete our online Enquiry Form.

Please note, failure to select the correct materials or products we supply (“the Products”) may result in damage to plant, equipment or property. In some instances, it may cause death or personal injury. We are not designers and do not give advice about design related matters concerning the Products. We can help and assist with the technical specifications for the Products. In specific applications, particularly where critical conditions exist, we will try to assist you within the limitations of the services that we offer. All information supplied by us is intended as technical co-operation outlining the specifications of the different Products which we supply. To the extent permitted in law, no warranty is given in respect of any information supplied by us. The customer must satisfy themselves as to the suitability of the Products for their intended application and use. The correct fitting of Products is the responsibility of the customer. Your statutory rights remain unaffected. Save in respect of death, personal injury or fraud, our entire liability to you, however arising from the supply of Products shall be limited to the £10M indemnity amount provided by our insurers.

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