Double block and bleed ball valves including retainer components
First Claim
1. A valve (2) comprising a first ball valve assembly (10) and a second ball valve assembly (12) each being self contained and each of said first and second ball valve assemblies having a passage (4, 6) therethrough in which a first seal (14, 14′
- ), an apertured ball valve (16, 16′
) and a second seal (18, 18′
) are disposed, said ball valves being independently actuatable between open and closed positions to allow fluid flow through the valve when both ball valves are in the open condition, characterised in that said first and second ball valve assemblies further comprise apertured retainer components (20, 20′
) lockingly inserted into each assembly to retain the ball valve component and first and second seals in each assembly and in that the assemblies are connected together to mate with one another with their respective passages substantially in alignment to form the valve with only a single joint (42).
4 Assignments
0 Petitions
Accused Products
Abstract
A valve of the double block and bleed type construction comprises a first valve assembly housing a first ball valve and a second valve assembly housing a second ball valve. The first and second ball valves are independently actuable between open and closed positions. Each of the ball valves are held within the particular valve assembly by an annular retainer component. Each valve assembly has a passage through which fluid can pass when the ball valve is in an open condition and also a mating surface which is brought to bear against the mating surface of the other valve assembly to form a valve with a single joint.
29 Citations
21 Claims
-
1. A valve (2) comprising a first ball valve assembly (10) and a second ball valve assembly (12) each being self contained and each of said first and second ball valve assemblies having a passage (4, 6) therethrough in which a first seal (14, 14′
- ), an apertured ball valve (16, 16′
) and a second seal (18, 18′
) are disposed, said ball valves being independently actuatable between open and closed positions to allow fluid flow through the valve when both ball valves are in the open condition, characterised in that said first and second ball valve assemblies further comprise apertured retainer components (20, 20′
) lockingly inserted into each assembly to retain the ball valve component and first and second seals in each assembly and in that the assemblies are connected together to mate with one another with their respective passages substantially in alignment to form the valve with only a single joint (42). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- ), an apertured ball valve (16, 16′
-
20. A method of assembling a double block valve (2), said method comprising the steps of forming a first ball valve assembly (10) by forming a body having a passage (4A), one end of which is of sufficient diameter (4A′
- ) to allow the valve components (14, 16, 18) to be moved into the passage (4A), inserting said components which comprising at least apertured ball valve (16) component and an apertured retainer (20) which retains the ball valve component within the assembly when the valve is closed and under fluid pressure and allows fluid to flow through the assembly when the ball valve is in an open condition, engaging the ball (16) with actuating means (30, 26, 28) to allow movement of the ball between open and closed positions, repeating the process to form a second ball valve assembly (12), bringing the assemblies together so that the end faces in which the retainers are located are adjacent and the passages in respective assemblies are aligned and connecting the assemblies together to form the valve.
- View Dependent Claims (21)
Specification