Pressure Control Valves Adjustment Options

“A” — 1/4-in. Hex Allen Head
	Durable 1/4-in. Allen head adjustment won't break like a screw slot.
	Design allows for low-effort adjustment under full-rated pressures.
	Exposed steel parts are zinc- or cadmium-plated for corrosion resistance.
	Positive stop prohibits A-, B- or C-type adjustments from taking the spring to a solid condition, thereby preserving circuit protection at the spring-range-specified maximum pressure.

“A-Alt” — 1/4-in. Hex Allen Head (for valve models RVD50-20 and CB10-30 only)
	Durable 1/4-in. Allen head adjustment won't break like a screw slot.
	Exposed steel parts are zinc- or cadmium-plated for corrosion resistance.
	Fixed Height Adjuster and integral spring-setting shoulder compress the internal spring to the desired pressure range. Height of the adjuster does not change. The adjuster screw will not back out of the valve when adjusted under pressure.
	Positive stop prohibits A-, B- or C-type adjustments from taking the spring to a solid condition, thereby preserving circuit protection at the spring-range-specified maximum pressure.

“B” — 1-1/2-in. Diameter Aluminum Knob
	Standard aluminum knobs won’t break like some plastic ones.
	Set screw provides “A” to “B” conversion using kit no. 6260010.
	Internal seals prevent external leakage.
	Generous raised hex allows for easy installationusing common hand tools. See Torque Values, page 9.020.1.

“C” — 1/4-in. Hex with Cover Cap
	Protective cap no. 7006700 converts “A” to “C”.
	Adjustment stems cannot be backed out of the valve.
	Springs are computer- designed for stable, quiet operation under a wide range of load conditions.

“F” — Factory Preset, Non-Adjustable
	The “F” plug is field-removable only if damaged.

	Note: Oil will flow from the open spring chamber if back pressure is present.

“H” — Factory Preset, Adjustable
	Recessed 5/16-in. Allen head “H”-type removable cap provides access to 1/4-in. internal Allen head adjustment.

	Note: Oil will flow from the open spring chamber if back pressure is present.

“L” — Option ‘C’ with Lockwire Holes			Adjusting without a Gauge
	1/16-in. diameter through-holes for lockwire use.		for Adjustment Types A, B, C and L
			Valve Size -08 -10 -12	Percent of Spring Pressure Range Achieved at 1 Revolution: 12.5% 10% 10%