Instruction Manual

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FEATURES:
• Modular or inline mounting; modular mounting allows regulators to be
positioned at increments of 45° for ease in adjustment
• Self-relieving diaphragm design, with large diaphragm sensing ratio
• Non-relieving - optional
• Pressure adjustment locking key; tamper-resistant pressure setting
• Reverse ow - optional
020
scfm
FLOW
l/s
0 10
20
psi
100
OUTLET PRESSURE
1.4
2.8
4.2
5.6
bar
7.0
Inlet Pressure: 100 psig (6.9 bar)
0
scfm
FLOW
l/s
0
00
40 60 80 100 120 140 160 180 200 220
20 30 40 50 60 70 80 90 100
3/4 Ports
3/8 Ports
1/2 Ports
40
60
80
20
psi
100
OUTLET PRESSURE
1.4
2.8
4.2
5.6
bar
7.0
00
40
60
80
20
psi
100
OUTLET PRESSURE
1.4
2.8
4.2
5.6
bar
7.0
00
40
60
80
240
110
FLOW CHARTS
Ports: 3/8, 1/2, 3/4
Flow to 220 scfm
MD4
TM
Modular General Purpose Regulators
STANDARD SPECIFICATIONS (for products on this page):
Ambient/Media Temperature: 40° to 175°F (4° to 79°C).
Body: Zinc.
Dome: Nylon; aluminum with optional 0 to 175 psig (0 to 12.1 bar)
spring.
Cap Color: Gold standard; optional gray, yellow, red, blue.
Fluid Media: Compressed air.
Inlet Pressure: 300 psig (20.7 bar) maximum.
Knob: Acetal.
Outlet Pressure: Adjustable up to 125 psig (8.6 bar); optional
adjusting springs.
Pressure Adjustment Locking Key: Removable.
Pressure Gauge: 0 to 200 psig (0 to 14 bar);
1/4 NPT gauge ports front and rear.
Panel Mounting: 2-1/16 inch (52 mm) hole required.
Seals: Nitrile.
Self-relieving: Non-relieving optional, consult ROSS.
Valve: Brass.
Valve Cap: Nylon.
Threads: NPT standard, BSPP, SAE.
A
C
B
0
BAR
100 x kPa
psi
120
1
6
0
200
80
40
0
2
4
68
10
12
14
HOW TO ORDER
ADJUSTMENT TYPE
52K - Knob (standard)
52T - Tee Handle
ADJUSTMENT RANGE
A - 0-175 psig (0-12.1 bar)
B - 0-125 psig (0-8.6 bar)
standard
C - 0-50 psig (0-3.4 bar)
D - 0-20 psig (0-1.4 bar)
FLOW OPTIONS
R - Reverse Flow
S - Standard (standard)
GAUGE
A - No Gauge
B - 0-200 psig (0-14 bar)
C - 0-60 psig (0-4 bar)
D - No Gauge with Panel
Mount Nut
E - 0-200 psig (0-14 bar)
Gauge with Panel Mount Nut
F - 0-60 psig (0-4 bar)
Gauge with Panel Mount Nut
COLOR
G - Gray
Y - Yellow
R - Red
B - Blue
2 - Gold (standard)
PIPE SIZE
3 - 3/8 NPTF
4 - 1/2 NPTF
5 - 3/4 NPTF
C - 3/8 BSPP
D - 1/2 BSPP
E - 3/4 BSPP
F - 3/4-16 SAE
G - 7/8-14 SAE
MD4 52K B S B 5 2 B
DIMENSIONS inches (mm) Weight †
A B* C** Depth † lb (kg)
3.5 (87) 5.6 (142) 1.6 (40) 2.9 (73) 2.56 (1.16)
* Dome removal clearance: add 0.625 (16).
** Cap removal clearance: add 0.50 (13).
† Less gauge.
IMPORTANT NOTE: Please read carefully and thoroughly all of the CAUTIONS on the inside back cover.
ISO Symbol
Regulator
Self-Relieving Non-Relieving