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US 9,885,420 B2Granted
Gate valve
AssigneeSRI Energy, Inc.
InventorAlagarsamy Sundararajan
Life of this patent
Estimating the term…
Abstract
An embodiment includes a gate valve comprising: a valve body including a cavity coupled to a channel having proximal and distal portions; a gate to seal and unseal the channel; proximal and distal seats adjacent the gate; wherein (a) the proximal seat traverses towards the gate and stops at a first position when the gate is closing and the proximal channel portion is more highly pressurized than the cavity, and (b) the distal seat slides away from the gate and stops at a second position when the gate is closing and the cavity is more heavily pressurized than the distal channel portion. Other embodiments are described herein.
Claims26
A gate valve comprising:
- a valve body including a cavity in fluid communication with a channel, having proximal and distal channel portions, which extends between proximal and distal valve body portions;
- a gate configured to seal the channel in a closed gate position and unseal the channel in an open gate position;
- a proximal seat between the proximal valve body portion and the gate and a distal seat between the distal valve body portion and the gate, the proximal seat including an annular groove on an outer surface of the proximal seat;
- and
- a seal, which directly contacts the valve body and the proximal seat, including (a)(i) a first ring contacting a first spring and a second ring contacting a second spring, (a)(ii) first and second spacers located between the first and second springs, and (a)(iii) an annular ring included in the annular groove and between the first and second spacers;
- wherein (a) the proximal seat slides towards the gate and then stops at a first position when the gate transitions to the closed gate position and the proximal channel portion includes fluid more highly pressurized than fluid included in the cavity, (b) the distal seat slides away from the gate and then stops at a second position when the gate transitions to the closed gate position and the cavity includes fluid more heavily pressurized than fluid in the distal channel portion, and (c) the first and second springs are not included in the annular groove.
3 more elements
A gate valve comprising:
- a valve body including a cavity coupled to a channel having proximal and distal portions;
- a gate to seal and unseal the channel;
- proximal and distal seats adjacent the gate, the proximal seat including an annular groove in a first annular outer surface of the proximal seat;
- a seal, which directly contacts the valve body and the proximal seat, including (a)(i) a first ring contacting a first spring and a second ring contacting a second spring, and (a)(ii) an annular ring included in the annular groove and between the first and second springs;
- and
- first and second spacers both located between the first and second springs;
- wherein (a) the proximal seat traverses towards the gate and stops at a first position when the gate is closing and the proximal channel portion is more highly pressurized than the cavity, and (b)-the first and second springs are not included in the annular groove.
4 more elements
A gate valve comprising:
- a valve body including a cavity coupled to a channel having proximal and distal portions;
- a gate to seal and unseal the channel;
- proximal and distal seats adjacent the gate;
- and
- a seal directly contacting the valve body and the proximal seat;
- wherein:
- the proximal seat is configured to traverse towards the gate and stop at a first position when the gate is closing and the proximal channel portion is more highly pressurized than the cavity;
- the seal includes:
- (a) a first ring contacting a first spring and a second ring contacting a second spring;
- (b) first and second spacers both located between the first and second springs, and (c) an annular ring;
- the first and second springs are each biased to press outwards against both the valve body and the proximal seat;
- the proximal seat includes an annular groove on an outer surface of the proximal seat;
- the annular ring is included in the annular groove and between the first and second spacers;
- and
- the first and second springs are not included in the annular groove.
12 more elements
Dependencies are inferred from the claim text.