🔍 Key Concepts

• How turning stem L clockwise affects the compression of the pressure control spring K and what that does to outlet pressure setpoint • How rotating the adjusting ring B counterclockwise changes the compression on the temperature control spring C and therefore the outlet temperature setpoint • The fact that this is a dual regulator, so pressure and temperature adjustments are largely independent but both act on the same main valve plug G controlling flow

💭 Think About

• Look at stem L and spring K: if you turn L clockwise from the top, does that drive the stem down and compress the spring more, or relieve compression? What change in outlet pressure is that normally used for on pressure regulators? • Now focus on ring B and spring C: when B is turned counterclockwise from above, does that move the ring up or down with respect to the spring? Would that increase or decrease the force needed from the temperature-sensing bellows to move the valve? • Once you’ve decided how pressure and temperature individually change, combine those two directions to see which choice matches the new pressure setpoint and the new temperature setpoint.

✅ Before You Answer

• Confirm whether turning L clockwise increases or decreases spring compression on the pressure control side (K). • Confirm whether turning B counterclockwise increases or decreases spring compression on the temperature control side (C). • Match the combination of higher/lower pressure and higher/lower temperature you’ve deduced to the option that reflects both changes together.