An actuator (200, 500) for use with a valve, the actuator (200,500) comprising: a housing; a plate (208, 506) defining an aperture (210, 508) therethrough and coupled at an end of the housing; a plunger that extends through the plate (208, 506) and operatively coupleable to a stem of the valve; one or more springs disposed in the housing and at least partially surrounding the plunger, the one or more springs to apply a force to the plunger; a spring load adjuster (202, 502) having a collar (212, 510) at least partially surrounding the plunger and extending through the aperture (210, 508) to operatively engage the one or more springs, the collar (212, 510) movable relative to the plate (208, 506) to enable an adjustment of the position of the collar (212, 510) relative to the plate (208, 506) to change a load provided by the one or more springs to the stem or a seat of the valve; and at least one locking device extending through the collar (212, 510) to fix the position of the collar (212, 510) relative to the plate (208, 506), the at least one locking device is externally accessible, the actuator further comprising one or more adjusters to moveably couple the collar (212, 510) to the plate (208, 506) and either: a) the one or more adjusters is externally accessible to enable changing the position of the collar without having to disassemble the actuator; or b) the collar is externally accessible and comprises a threaded exterior surface that engages a threaded aperture of the plate which together act as an adjuster. a housing; a plate (208, 506) defining an aperture (210, 508) therethrough and coupled at an end of the housing; a plunger that extends through the plate (208, 506) and operatively coupleable to a stem of the valve; one or more springs disposed in the housing and at least partially surrounding the plunger, the one or more springs to apply a force to the plunger; a spring load adjuster (202, 502) having a collar (212, 510) at least partially surrounding the plunger and extending through the aperture (210, 508) to operatively engage the one or more springs, the collar (212, 510) movable relative to the plate (208, 506) to enable an adjustment of the position of the collar (212, 510) relative to the plate (208, 506) to change a load provided by the one or more springs to the stem or a seat of the valve; and at least one locking device extending through the collar (212, 510) to fix the position of the collar (212, 510) relative to the plate (208, 506), the at least one locking device is externally accessible, the actuator further comprising one or more adjusters to moveably couple the collar (212, 510) to the plate (208, 506) and either: a) the one or more adjusters is externally accessible to enable changing the position of the collar without having to disassemble the actuator; or b) the collar is externally accessible and comprises a threaded exterior surface that engages a threaded aperture of the plate which together act as an adjuster. a) the one or more adjusters is externally accessible to enable changing the position of the collar without having to disassemble the actuator; or b) the collar is externally accessible and comprises a threaded exterior surface that engages a threaded aperture of the plate which together act as an adjuster.