ZM-R
Blanketing Valve low pressure reducing valve
Features
Large Diaphragm Area
To Increase the Closing Force
Stainless Steel or Hastelloy
all Function-Relevant and Product-Contacting Parts Are Made of Stainless Steel or Hastelloy
Simple Adjustment of Set Pressure
(within the Spring Range)
Any Installation Position
(taking the Set Pressure 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 Is Guided Inside the Housing to Protect Against Harsh Weather Conditions
Precision
High Precision
Used in Explosion Hazardous Areas
can Be Used in Explosion 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. 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 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. It is designed as a diaphragm 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 mode, vacuum pressures down to -200 mbar /-80 inch W.C. (relative pressure) can be achieved.
Product Data
Dimensions
To select the nominal size (DN), please use the flow capacity charts on the following pages
| DN | 15 / ½" | 25 / 1'' | 50 / 2'' | 100 / 4'' | 15 / ½" | 25 / 1'' | 50 / 2'' | 100 / 4'' | |
| a | 214 | 214 | – | – | 8.43 | 8.43 | – | – | |
| b | 168 | 168 | – | – | 6.61 | 6.61 | – | – | |
| c* | – | – | 214 / 360 | 360 / 600 | – | – | 8.43 / 14.17 | 14.17 / 23.62 | |
| d | DIN | 150 | 160 | 150 | 250 / 250 | 5.91 | 6.3 | 5.91 | 9.84 / 9.84 |
| ANSI | 180 | 160 | 150 | 250 / 250 | 7.09 | 6.3 | 5.91 | 9.84 / 9.84 | |
| e | 214 | 214 | 230 | 275 / 310 | 8.43 | 8.43 | 9.06 | 10.83 / 12.2 | |
| f | 87 | 87 | 103 | 148 / 155 | 3.43 | 3.43 | 4.06 | 5.83 / 6.10 |
Dimensions in mm / inches
*depends upon size of diaphragm
Dimensions
Selection of valve seat depending on flow rate
| Size | Seat in mm / inches | Kvs | Number |
| 25 / 1'' | 2,0 / 0.08 | 0,15 | 20 |
| 4,5 / 0.18 | 0,60 | 45 | |
| 7,5 / 0.30 | 1,20 | 75 | |
| 10,0 / 0.39 | 1,70 | 100 | |
| 14,0 / 0.55 | 2,40 | 140 | |
| 50 / 2'' | 14,0 / 0.55 | 2,80 | 140 |
| 18,0 / 0.71 | 6,80 | 180 | |
| 26,0 / 1.02 | 14,50 | 260 | |
| 100 / 4'' | 42,0 / 1.65 | 33,50 | 420 |
| 55,0 / 2.17 | 68,00 | 550 |
*1 Kvs = 0.86 Cv; 1 Cv = 1.17 Kvs
Material selection for housing
| Design | S | H | |
| Housing | Stainless Steel | Hastelloy | |
| Valve seat | Stainless Steel | Hastelloy | |
| Valve pallet | Stainless Steel | Hastelloy | |
| Valve seat sealing | FFKM | FFKM | |
| Gasket | PTFE | PTFE | |
| Diaphragm P | PTFE | PTFE | Marking P |
| Alternative: Diaphragm V | Viton | - | Marking V |
Optional: Inner part of housing electropolished. Special materials upon request
Type of connection
| FD | DIN 2501, PN 16 | DIN |
| FA | ASME B16.5 CL 150 R.F. | ASME |
| G | Thread | G 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) | 0,15 | 0,25 | 0,40 | 0,65 | 1,00 | 1,50 | 2,50 | 4,00 | 6,00 | 10,00 | Sitz-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) | 0,15 | 0,25 | 0,40 | 0,65 | 1,00 | 1,50 | 2,50 | 4,00 | 6,00 | 10,00 | Sitz-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] |
| 10 | 28,9 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 |
| 20 | 28,0 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 |
| 100 | 18,0 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) | 0,15 | 0,25 | 0,40 | 0,65 | 1,00 | 1,50 | 2,50 | 4,00 | 6,00 | 10,00 | Sitz-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] |
| 10 | 346 703 | 453 921 | 587 1174 | 741 1504 | 922 1871 | 1151 2336 | 1609 3266 | 2296 4661 | 3212 6512 | 5045 10241 | Ø42,0 Ø55,0 |
| 20 | 335 681 | 446 906 | 574 1165 | 739 1500 | 921 1871 | 1151 2336 | 1609 3266 | 2296 4661 | 3212 6512 | 5045 10241 | Ø42,0 Ø55,0 |
| 100 | 216 438 | 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
