A deflator valve for reducing noise and deflation time and improving accuracy and ease of adjusting a pressure setting, comprising:
- a) a main body (101) comprising:
- i) a plate (104) perpendicularly disposed within the main body (101) to divide an interior into a piston cavity (106) and a valve stem cavity (107);
- ii) one or more input ports (102) disposed through the plate (104) for fluidly connecting the valve stem cavity (107) to the piston cavity (106), wherein the one or more input ports (102) are skewed such that for an entrance and an exit of each input port are offset from one another;
- iii) one or more exhaust vents (103) disposed through a sidewall (105) of the main body in the piston cavity (106) for relieving pressure from within the main body, wherein the one or more exhaust vents (103) are skewed such that an entrance and an exit of each exhaust vent are offset from one another;
- iv) a depression pin (108) projecting from the plate (104) and into the valve stem cavity (107);
- v) a seating ring (113) projecting from the plate (104) and facing the piston cavity (106);
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- vi) adjustment threads (111) disposed exterior to the piston cavity (106);
- b) a piston (120) movably disposed in the piston cavity (106), the piston (120) comprising:
- i) a piston O-ring (121) disposed around an outer circumference of the piston, wherein the piston O-ring (121) creates a seal that reduces or eliminates air leaks between the piston (120) and the piston cavity (106);
- ii) a membrane pad (122) disposed on an end of the piston facing the plate (104) and abutting against the seating ring (113);
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- iii) a shaft cavity (124);
- c) a lock nut (150) threadably coupled to the main body (101) via the adjustment threads (111);
- d) an adjustment cap (130) threadably coupled to the main body (101) via adjustment threads (111), wherein the adjustment cap (130) covers the piston cavity (106);
- e) a spring shaft (140) coupled to the adjustment cap (130), the spring shaft (140 having a shaft tip (141) disposed in the shaft cavity (124) such that the shaft tip (141) rest upon a shaft seat (125) in the piston (120);
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- f) a spring (143) wrapped around the spring shaft (140), wherein a first end of the spring sits in an adjustment cap spring seat (133) and a second end of the spring sits in a shaft spring seat (142);
- wherein the adjustment cap (130) is threadably coupled to the main body (101), thereby compressing the spring (143) between the adjustment cap spring seat (133) and the shaft spring seat (142) such that a desired pressure setting is set based on a spring force of the compressed spring (143), wherein the lock nut (150) is threaded to abut against the adjustment cap (130) after the adjustment cap (130) is set.