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Technical Data
Model 238890
spring operated, with
fluid pressure gauge
M d l 238889
Model 238892
spring operated, with
fluid pressure gauge
M d l 238891
Models 238894,
248090, and 255072
air operated, with
fluid pressure gauge
Model 244734
air operated, with
pressure sensor
ports
Model 238889
spring operated, with
EZ Flush plug
Model 238891
spring operated, with
EZ Flush plug
fl
u
id
pressure gauge
Model 238893
air operated, with EZ
Flush plug
por
t
s
Maximum fluid
inlet pressure
6000 psi
(41 MPa, 414 bar)
6000 psi
(41 MPa, 414 bar)
6000 psi
(41 MPa, 414 bar)
6000 psi
(41 MPa, 414 bar)
Regulated fluid
outlet pressure
range
500–3000 psi
(3.4–21 MPa,
34–207 bar)
3000–5000 psi
(21–34 MPa,
207–345 bar)
500–4000 psi
(3.4–28 MPa,
34–276 bar)
500–4000 psi
(3.4–28 MPa,
34–276 bar)
Maximum inbound
air pressure
–– –– 100 psi
(0.7 MPa, 7 bar)
100 psi
(0.7 MPa, 7 bar)
Fluid inlet/outlet
size
3/8 npt(f) 3/8 npt(f) 3/8 npt(f)
1/2 npt(f) for 248090
1/2 npt(f)
Gauge port size 1/4 npt(f) 1/4 npt(f) 1/4 npt(f) 1/4 npt(f)
Fluid pressure
gauge (Models
238890, 238892,
and 238894)
0–3000 psi
(0–21 MPa,
0–207 bar)
0–5000 psi
(0–34 MPa,
0–345 bar)
0–5000 psi
(0–34 MPa,
0–345 bar)
––
Maximum flow
(in 65 cp material)
2 gpm (7.6 lpm) 2 gpm (7.6 lpm) 2 gpm (7.6 lpm) 2 gpm (7.6 lpm)
Maximum fluid
viscosity
up to 15,000 cp up to 15,000 cp up to 15,000 cp up to 15,000 cp
Maximum operat-
ing temperature
120_ F (50_ C) 120_ F (50_ C) 120_ F (50_ C) 120_ F (50_ C)
Weight (with gauge) 7.0 lb (3.2 kg) 7.0 lb (3.2 kg) 11.7 lb (5.3 kg) 11.7 lb (5.3 kg)
Fluid diaphragms PTFE with TPE
backing
PTFE with TPE
backing
PTFE with TPE
backing
PTFE with TPE
backing
Wetted parts (all
models)
304, 316, 17–4 passivated SST, nickel– and cobalt–bound tungsten carbide, PTFE for all
models; ceramic for model 248090, 244734, and 255072 only.
Adjustment tool
(spring-operated
models)
6 mm hex wrench 6 mm hex wrench –– ––
Air Requirements for Air-Operated Regulators
(Models 238893, 238894, 248090, and 255072)
The following table shows the approximate air pressure needed to regulate the air-operated regulator to a given
fluid outlet pressure.
Regulated Fluid Outlet Pressure
Air Pressure
Models 238894, 248090,
and 255072 Model 255072
psi MPa bar psi MPa bar psi MPa bar
28 0.19 1.9 1000 7 69 550 4 40
49 0.34 3.4 2000 14 138 1150 8 80
70 0.48 4.8 3000 21 207 1800 12 120
90 0.62 6.2 4000 28 276 2450 17 170
100 0.68 6.8 4000 28 276 2700 19 190