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ZM-R

Blanketing Valvelow pressure reducing valve

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Features

Large Diaphragm Area
to increase the closing force
Stainless Steel or Hastelloy
all function-relevant and product Product Includes equipment, protective systems, devices, components and combinations of these. -contacting parts are made of stainless steel or Hastelloy
Simple Adjustment of Set Pressure
(within the spring Spring A spring is a spiral of wire which returns to its original shape after it is pressed or pulled. range)
Any Installation Position
(taking the set pressure Set pressure Set pressure is the gauge pressure at the device inlet at which the relief device is set to start opening under service conditions. into account)
Exteral Energy Supply
no external energy supply needed
High Flow Capacity
reduces costs through the use of smaller valves
Guided Valve Pallet
valve pallet Valve pallet Valve pallet is the generic term for the assembly that rests on the valve seat. is guided inside the housing Housing A housing is a solid shell, which surrounds a content, either protecting the content from external influences, or protecting the environment from the content. to protect against harsh weather conditions
Precision
high precision
Used in Explosion Hazardous Areas
can be used in explosion Explosion Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously. hazardous areas
Sturdy Housing Design
(PN 10 and PN 16)
Function and Description

Highly Developed Low-Pressure Reducing Valve

The blanketing valve type ZM-R is a highly developed low pressure reducing valve Pressure reducing valve A pressure reducing valve reduces a higher, fluctuating inlet pressure to a lower, constant outlet pressure. . This valve is typically used to inert or blanket tanks, vessels, or other process systems with nitrogen or other blanketing gases by controlling the tank pressure Tank pressure Tank pressure is the pressure within a tank. to ist desired value. High nitrogen or blanketing gas supply pressures up to 16 bar / 232 psi are safely reduced down to only a few mbar / inch W.C..

Membrane-Controlled and Spring-Loaded Proportional Regulator

The ZM-R low pressure reducing valve is a direct acting, one stage pressure control device Device A device is a pipe component that influences the media flow by opening, closing, or partially shutting off the flow channel or by dividing or mixing the media flow. . It is designed as a diaphragm Diaphragm A diaphragm is a thin layer of material, which has a large surface area. controlled, spring-loaded proportional acting valve. The valve controls the tank pressure by increasing flow as the tank pressure drops. This means that the mass flow through the valve depends on the pressure differential of the set pressure to the actual tank pressure. When the actual tank pressure reaches the set pressure, the control unit closes, and there is no flow.

For Precise Pressure Control

At the control diaphragm, (which can be made from PTFE or Viton), the tank pressure (P2) is balanced with the adjustment spring and the supply pressure (P1). In a depressurized tank, the adjustment spring holds the valve pallet in the fully open position. As the tank pressure increases, the valve pallet moves toward the seat, and the mass flow is reduced. When the desired tank pressure is reached, the valve will close.

Precise Pressure Control up to -200 mbar

If the tank pressure decreases, the valve will open. If the system is operated in a vacuum Vacuum Vacuum is the pressure in an enclosed space that is lower than the ambient pressure. mode, vacuum pressures down to -200 mbar /-80 inch W.C. (relative pressure) can be achieved.
Product Data and Features

Dimensions

To select the nominal size Nominal size The nominal size is an alphanumeric designation of size for components in a piping system, used for reference purposes, comprising the letters DN followed by a dimensionless integer that is indirectly related to the physical size of the bore or outside diameter of the connections, expessed in millimeters. (DN), please use the flow capacity charts on the following pages

DN15 / ½"25 / 1''50 / 2''100 / 4'' 15 / ½"25 / 1''50 / 2'' 100 / 4''
a214214––8.438.43––
b168168––6.616.61––
c*––214 / 360360 / 600––8.43 / 14.1714.17 / 23.62
dDIN150160150250 / 2505.916.35.919.84 / 9.84
ANSI180160150250 / 2507.096.35.919.84 / 9.84
e214214230275 / 3108.438.439.0610.83 / 12.2
f8787103148 / 1553.433.434.065.83 / 6.10

Dimensions in mm / inches

*depends upon size of diaphragm

Dimensions

Selection of valve seat Valve seat The valve seat is a component on which the valve pallet rests when the valve is closed. depending on flow rate

Size Seat in mm / inchesKvsNumber
25 / 1''2,0 / 0.080,1520
4,5 / 0.180,6045
7,5 / 0.301,2075
10,0 / 0.391,70100
14,0 / 0.552,40140
50 / 2''14,0 / 0.552,80140
18,0 / 0.716,80180
26,0 / 1.0214,50260
100 / 4''42,0 / 1.6533,50420
55,0 / 2.1768,00550

*1 Kvs = 0.86 Cv; 1 Cv = 1.17 Kvs

Material selection for housing

Design SH
HousingStainless SteelHastelloy
Valve seatStainless SteelHastelloy
Valve palletStainless SteelHastelloy
Valve seat sealingFFKMFFKM
GasketPTFEPTFE
Diaphragm PPTFEPTFEMarking P
Alternative: Diaphragm VViton-Marking V

Optional: Inner part of housing electropolished. Special materials upon request

Type of connection

FDDIN 2501, PN 16DIN
FAASME B16.5 CL 150 R.F.ASME
GThreadG or NPT

other types upon request

Flow rates for P2 pressure range (Europe - metric units)

ZM-R 15 / ZM-R 25: flow rate (air, 0°C) at ∆P = P1 - P2 and valve full open

P 1 (bar)0,150,250,400,651,001,502,504,006,0010,00Sitz-Ø
P 2 (mbar) [Nm³ / h] [Nm³ / h] [Nm³ / h] [Nm³ / h] [Nm³ / h] [Nm³ / h] [Nm³ / h] [Nm³ / h] [Nm³ / h] [Nm³ / h] [mm]
10 6,2
12,4
17,5
24,8		8,1
16,2
23,0
32,5		10,3
20,7
29,3
41,4		13,2
26,5
37,6
53,1		16,5
33,0
46,7
66,0		20,6
41,2
58,4
82,4		28,8
57,6
81,6
115,2		41,1
82,2
116,5
164,5		57,5
115,0
163,0
230,1		90,3
180,7
256,0
361,4		Ø4,5
Ø7,5
Ø10,0
Ø14,0
20 6,0
12,0
17,0
24,0		7,9
15,9
22,6
31,9		10,2
20,5
29,1
41,1		13,2
26,4
37,5
52,9		16,5
33,0
46,7
66,0		20,6
41,2
58,4
82,4		28,8
57,6
81,6
115,2		41,1
82,2
116,5
164,5		57,5
115,0
163,0
230,1		90,3
180,7
256,0
361,4		Ø4,5
Ø7,5
Ø10,0
Ø14,0
100 3,8
7,7
10,9
15,4		6,7
13,4
18,9
26,8		9,4
18,9
26,8
37,9		12,8
25,6
36,3
51,3		16,4
32,8
46,5
65,6		20,6
41,2
58,4
82,4		28,8
57,6
81,6
115,2		41,1
82,2
116,5
164,5		57,5
115,0
163,0
230,1		90,3
180,7
256,0
361,4		Ø4,5
Ø7,5
Ø10,0
Ø14,0
200 -
-
-
-		4,0
8,0
11,4
16,1		8,00
16,1
22,9
32,3		12,1
24,2
34,3
48,4		16,1
32,3
45,8
64,6		20,6
41,2
58,4
82,4		28,8
57,6
81,6
115,2		41,1
82,2
116,5
164,5		57,5
115,0
163,0
230,1		90,3
180,7
256,0
361,4		Ø4,5
Ø7,5
Ø10,0
Ø14,0
500 -
-
-
-		-
-
-
-		-
-
-
-		7,8
15,6
22,1
31,2		14,2
28,5
40,4
57,0		20,1
40,3
57,1
80,7		28,8
57,6
81,6
115,2		41,1
82,2
116,5
164,5		57,5
115,0
163,0
230,1		90,3
180,7
256,0
361,4		Ø4,5
Ø7,5
Ø10,0
Ø14,0

Flow rates for P2 pressure range (Europe - metric units)

ZM-R 50: flow rate (air, 0°C) at ∆P = P1 - P2 and valve full open

P 1 (bar)0,150,250,400,651,001,502,504,006,0010,00Sitz-Ø
P 2 (bar)[Nm³ / h][Nm³ / h][Nm³ / h][Nm³ / h][Nm³ / h][Nm³ / h][Nm³ / h][Nm³ / h][Nm³ / h][Nm³ / h][mm]
1028,9
70,3
150,0
37,9
92,1
196,5
48,3
117,4
250,4
61,9
150,4
320,8
77,0
187,1
399,1
96,2
233,6
498,3
134,5
326,6
696,5
191,9
466,1
994,0
268,5
652,1
1390
421,6
1024
2183
Ø14,0
Ø18,0
Ø26,0
2028,0
68,1
145,3
37,3
90,6
193,3
47,9
116,5
248,4
61,7
150,0
319,9
77,0
187,1
399,0
96,2
233,6
498,3
134,5
326,6
696,5
191,9
466,1
994,0
268,5
652,1
1390
421,6
1024
2183
Ø14,0
Ø18,0
Ø26,0
10018,0
43,8
93,5
31,2
75,9
162,0
44,2
107,4
229,1
59,9
145,5
310,2
76,6
186,1
396,9
96,2
233,6
498,3
134,5
326,6
696,5
191,9
466,1
994,0
268,5
652,1
1390
421,6
1024
2183
Ø14,0
Ø18,0
Ø26,0
200-
-
-
18,8
45,8
97,6
37,7
91,6
195,3
56,5
137,4
293,0
75,4
183,2
390,6
96,2
233,6
498,3
134,5
326,6
696,5
191,9
466,1
994,0
268,5
652,1
1390
421,6
1024
2183
Ø14,0
Ø18,0
Ø26,0
500-
-
-
-
-
-
-
-
-
36,4
88,6
188,9
66,6
161,7
344,9
94,1
228,7
487,8
134,5
326,6
696,5
191,9
466,1
994,0
268,5
652,1
1390
421,6
1024
2183
Ø14,0
Ø18,0
Ø26,0

Flow rates for P2 pressure range (Europe - metric units)

ZM-R 100: flow rate (air, 0°C) at ∆P = P1 - P2 and valve full open

P 1 (bar)0,150,250,400,651,001,502,504,006,0010,00Sitz-Ø
P 2 (bar)[Nm³ / h][Nm³ / h][Nm³ / h][Nm³ / h][Nm³ / h][Nm³ / h][Nm³ / h][Nm³ / h][Nm³ / h][Nm³ / h][mm]
10346
703
453
921
587
1174
741
1504
922
1871
1151
2336
1609
3266
2296
4661
3212
6512
5045
10241
Ø42,0
Ø55,0
20335
681
446
906
574
1165
739
1500
921
1871
1151
2336
1609
3266
2296
4661
3212
6512
5045
10241
Ø42,0
Ø55,0
100216
438
374
759
529
1074
716
1455
917
1861
1151
2336
1609
3266
2296
4661
3212
6512
5045
10241
Ø42,0
Ø55,0
200-
-
225
458
451
916
676
1374
902
1832
1151
2336
1609
3266
2296
4661
3212
6512
5045
10241
Ø42,0
Ø55,0
500-
-
-
-
-
-
436
886
796
1617
1127
2287
1609
3266
2296
4661
3212
6512
5045
10241
Ø42,0
Ø55,0

Flow rates for P2 vacuum range (Type ZM-R/N) upon request

Design Types and Specifications

Two different designs are available:
Blanketing valve for overpressure Overpressure Overpressure refers to an increase in pressure in a system or vessel above the normal operating pressure. , standard designZM-R –
Blanketing valve for vacuum, standard designZM-R / N

Other special devices can be supplied on request
For in-line valves any back pressure Back pressure The back pressure is the sum of built-up back pressure and superimposed back pressure. , which will influence the set pressure and opening characteristics, has to be taken into account.

Settings

Supply pressure:+16 bar
+6424 inch W.C.
Set pressure for overpressure function:+500 mbar
+200 inch W.C.
Set pressure for vacuum function:-200 mbar
-80 inch W.C.
Applications

Landfill and Waste Water Treatment Plants

Fixed Roof Storage Tanks

Methanol Fueled Ships

Contact CSR Department 

If you have any questions, feedback, or additional input, our team of experts will be glad to support you.

Picture of Mrs. Auris-Nadine Hillen
Mrs. Auris-Nadine Hillen

CSR Department

+49 (0)5307 809 108