Control valve flow adjustment device
View Patent ↗A valve includes a fluid inlet passage having a fluid inlet, a fluid outlet passage, an orifice between the fluid inlet passage and the fluid outlet, and a moveable valve plug adapted to move with respect to the orifice to vary the flow of fluid between the fluid inlet passage and the fluid outlet passage. A movable valve stem is attached to the valve plug and a travel limiting device is attached to the valve stem. The travel limiting device permits the valve to be placed in one of a plurality of desired flow configurations.
1. A valve, comprising:
a housing containing a fluid inlet passage and a fluid outlet passage;
an orifice disposed between the fluid inlet passage and the fluid outlet passage;
a movable valve plug adapted to move with respect to the orifice to vary the flow of fluid between the fluid inlet passage and the fluid outlet passage;
a movable valve stem attached to the valve plug, the moveable valve stem including a plurality of serrations disposed thereon and an integral travel limiting device for adjusting a valve travel limit wherein adjustments to a valve travel limit can be made outside the housing such that the adjustments upon the serrations provide a plurality of predefined positions that correspond to a predetermined maximum flow capacity of the valve.
2. The valve of claim 1 , wherein the integral travel limiting device includes serrations shaped and sized to mate with the moveable valve stem serrations.
3. The valve of claim 1 , wherein the integral travel limiting device includes a collar releasably attached to the moveable valve stem.
4. The valve of claim 3 , wherein the collar includes a plurality of collar pieces releasably attached to one another.
5. The valve of claim 4 , wherein at least one of the collar pieces includes an opening.
6. The valve of claim 5 , wherein the opening is an elongate slot.
7. The valve of claim 5 , wherein the at least one movable member includes a spring ring.
8. The valve of claim 3 , wherein the collar is releasable attached to the valve stem by at least one movable member that engages an indentation on the valve stem.
9. The valve of claim 8 , wherein the indentation is a blind hole.
10. The valve of claim 8 , wherein the indentation is a through bore.
11. The valve of claim 8 , wherein the indentation is a circumferential groove.
12. The valve of claim 8 , wherein the indentation includes a “shift gate” pattern of grooves.
13. The valve of claim 8 , wherein the at least one movable member includes a set screw.
14. The valve of claim 8 , wherein the at least one movable member includes a fastener.
15. The valve of claim 1 , wherein the travel limiting device includes a collar threadably attached to the moveable valve stem.
16. The valve of claim 15 , further including a lock nut threadably attached to the valve stem.
17. The valve of claim 1 , wherein the valve includes a casing, and the travel limiting device includes an adjustment knob threadably attached to the casing.
18. The valve of claim 1 , wherein the travel limiting device includes a knob having a plurality of adjustment fingers extending therefrom.
19. A valve, comprising:
a housing containing a fluid inlet passage and a fluid outlet passage;
an orifice disposed between the fluid inlet passage and the fluid outlet passage;
a movable valve plug adapted to move with respect to the orifice to vary the flow of fluid between the fluid inlet passage and the fluid outlet passage;
a movable valve stem attached to the valve plug, the moveable valve stem including a plurality of serrations disposed thereon and an integral travel limiting device for adjusting a valve travel limit wherein adjustments to a valve travel limit can be made outside the housing; the integral travel limiting device further including serrations shaped and sized to mate with the moveable valve stem serrations such that the adjustments to the valve travel limit correspond to a maximum flow capacity of the valve.
20. The valve of claim 19 , wherein the integral travel limiting device includes a collar releasably attached to the moveable valve stem.
21. The valve of claim 20 , wherein the collar includes a plurality of collar pieces releasably attached to one another.
22. A valve, comprising:
a housing containing a fluid inlet passage and a fluid outlet passage;
an orifice disposed between the fluid inlet passage and the fluid outlet passage;
a movable valve plug adapted to move with respect to the orifice to vary the flow of fluid between the fluid inlet passage and the fluid outlet passage;
a movable valve stem attached to the valve plug, the moveable valve stem including a plurality of serrations disposed thereon and an integral travel limiting device for adjusting a valve travel limit wherein adjustments to a valve travel limit can be made outside the housing, the travel limiting device further including a collar threadably attached to the moveable valve stem such that the adjustments to the valve travel limit correspond to a maximum flow capacity of the valve.