Low pressure regulator Type NDR 0515 and Type NDR 0516
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Additional diaphragm option
The additional diaphragm AD (additional diaphragm) is installed on the atmospheric side of
the regulator diaphragm. If the regulator diaphragm is damaged, the additional diaphragm
stops gas leaking. If the regulator diaphragm is damaged, the safety overpressure shut-off
valve (OPSO) responds and can no longer be permanently unlocked. A small volume of gas
escapes. The product must be replaced. If an additional diaphragm is installed, there is no
need for a pressure relief valve (PRV) and excess pressure does not have to be discharged
to the atmosphere.
Optional thermal shut-off device:
At temperatures above + 100 °C the shut-off device is triggered and automatically blocks the
gas flow. When the thermal shut-off device has responded, the pressure regulator can no
longer be used and must be replaced. The pressure regulator is also marked with "t".
Test connector option
A leak tester can be connected to the test connector for pressure and leak tests. First, loosen
the set screw in the test connector. When you have used it, tighten the set screw again and
check for leaks again. See LEAK CHECK.
Insect protection option
Insert in the breather on the 8 mm vent socket or screw into the female
thread G 1/8.
Check regularly that the sieve is not blocked. A blocked sieve can increase or lower the outlet
pressure and cause the safety overpressure shut-off valve (OPSO) to respond. Clean or
replace it as required.
CONNECTIONS
Inlet, Outlet,
optional
Trading name and dimensions
acc. to standard
Installation
instructions
Compression/separation connector
•
Thread optionally G 3/4, G 1
•
Nominal size optionally 12 mm, 15 mm,
18 mm, 22 mm, 28 mm
Spanner sizes
G 3/4 = size 30
G 1 = size 38
Hexagonal
Cylindrical female thread
•
G.37 =
F
G 1/4, G 3/8, G 1/2, G 3/4 or G 1
•
For a screw-in connector with O-ring
Solder/separation connector LTV
•
G.16 or H.10
= G 3/4 or G 1 thread
•
Diameter 10 mm to 28 mm
Spanner sizes
G 3/4 = size 30
G 1 = size 38
Hexagonal
Compression fitting
•
G.22 and H.8
= compr. fit 12, compr. fit 15,
compr. fit 18, compr. fit 22, compr. fit 28,
compr. fit 35
