Brochure

78
Regulators
NPT NPT
Size In. Size In.
ABC DE
3
⁄4
3
⁄4 2
3
⁄4 (70) 1
7
⁄8 (48) 3
3
⁄4 (95)
1 12
3
⁄4 (70) 2 (50) 4 (102)
1
1
⁄4 1
1
⁄4 3
7
⁄8 (98) 3
7
⁄8 (98) 5
1
⁄4 (133)
1
1
⁄2 1
1
⁄2 3
7
⁄8 (98) 3
7
⁄8 (98) 5
1
⁄4 (133)
2 23
7
⁄8 (98) 3
7
⁄8 (98) 6 (152)
Tempering Valves
Series 21
Series 21
• Fast acting, corrosion resistant actuator
• Solid filled thermostatic actuator exerts high operating
force and provides reliable service
• Easy temperature adjustment
• No special tools required
• Cast brass body
• Adjustable temperature ranges
Model 21 140–200°F (60–93°C)
Model 21H 100– 200°F (38–93°C)
Model 21LT 100 –140°F (38 –60°C)
• Maximum pressure 125 psig (8.6 bar)
• Maximum hot water supply temperature 235°F (113°C)
Model 21 provides wide temperature adjustment range for
hot and cold water mixing.
Model 21H provides widest temperature adjustment
range for radiant heating applications where accurate
temperature control is less critical.
Model 21LT provides the greatest accuracy of
temperature control.
Hoffman Specialty Tempering Valves are designed to
control temperature in water mixing applications such as
radiant floor heating, hot water heating and industrial
processing. They can also be used to divert flow in cooling
systems. Series 21 Valves can be used for residential,
industrial, commercial or institutional applications.
Dimensions in. (mm)
WARNING
Do not use Tempering Valves as anti-
scald devices. Tempering valves may
need to be used in conjunction with an
anti-scald device.
Failure to follow this warning could
cause serious burns, personal injury or
death.
!
INLET
NPT
INLET
NPT
A
B
OUTLET
NPT
E
T
P
T
PTP
I
N
L
N
P
A
B
O
U
T
L
E
T
C
D
E
A
Hoffman Specialty
®
Regulators