NTVS – 2-tee DIN-standard ventiil
The NTVS series is intended for control of hot and cold water, glycol-mixed water, steam and district heating. The valves from DN20 to DN150 are pressure balanced, which means that they can handle differential pressure with low force. The valve has a soft seal between cone and seat, which makes it completely tight. It has self-adjusting teflonpackings and o-rings in viton.
For applications in steam and at a pressure drop of 7 bars or higher, we recommend using a metal packing (stainless steel). Use the extra letter M at the end of the reference type when ordering a valve with metal packing, for example NTVS50-27M instead of the usual NTVS50-27. For valves with metal packing, the maximum leakage is 0.05 % of kvs.
The NTVS valves meet the requirements of DIN-standard DIN 3202/F1 and ISO 5752 table 1.
Tehnilised andmed
| Pressure rating |
PN16 |
| Connection |
Flanges according to SS 335 table 6 |
| Flow characteristics |
Equal percentage |
| Max. leakage |
0.0 % of the kvs value (PTFE gasket, carbon-filled 25 %, no leakage) / 0.05 % of kvs for NTVS…-…M models with metal packing |
| Media temperature |
-5…+185°C |
| Media |
Hot, cold, glycol-mixed water or steam |
| Rangeability |
100:1 |
| Max, differential pressure |
1600kPa |
| Body |
Nodular cast iron Grade 500/7 |
| Seat |
Stainless steel 304S15 (DN15-DN100) or gunmetal 1400 LG2 (DN125-150) |
| Plug |
Stainless steel 303S31 (DN15-DN100) or gunmetal 1400 LG2 (DN125-150) |
| Stem |
Stainless steel 303S31 |
| Lining |
Stainless steel 304S15 |
| Seat packing, soft seal |
PTFE with 25 % carbon |
| Seat packing, metal seal |
Stainless steel X3CrNiMoN27-5-2 |
| Packing box |
Dezincification resistant brass CW 602N, self-adjusting teflon |
| O-rings |
Viton |
Tootevalik
| NTVS15-0,4 |
Nominal diameter
DN15
|
Kvs
0.4
|
Stroke
20 mm
|
| NTVS15-1,0 |
Nominal diameter
DN15
|
Kvs
1.0
|
Stroke
20 mm
|
| NTVS15-1,6 |
Nominal diameter
DN15
|
Kvs
1.6
|
Stroke
20 mm
|
| NTVS15-2,7 |
Nominal diameter
DN15
|
Kvs
2.7
|
Stroke
20 mm
|
| NTVS20-0,8 |
Nominal diameter
DN20
|
Kvs
0.8
|
Stroke
20 mm
|
| NTVS20-1,6 |
Nominal diameter
DN20
|
Kvs
1.6
|
Stroke
20 mm
|
| NTVS20-2,7 |
Nominal diameter
DN20
|
Kvs
2.7
|
Stroke
20 mm
|
| NTVS20-3,9 |
|
Kvs
3.9
|
Stroke
20 mm
|
| NTVS20-6,3 |
|
|
Stroke
20 mm
|
| NTVS25-1,6 |
|
|
Stroke
20 mm
|
| NTVS25-2,5 |
Nominal diameter
DN25
|
|
Stroke
20 mm
|
| NTVS25-4,0 |
|
|
|
| NTVS25-6,3 |
|
|
|
| NTVS25-10 |
|
|
|
| NTVS32-4,0 |
|
|
|
| NTVS32-6,3 |
|
|
|
| NTVS32-10 |
|
|
|
| NTVS32-16 |
|
|
|
| NTVS40-6,3 |
Nominal diameter
DN40
|
Kvs
6.3
|
|
| NTVS40-10 |
Nominal diameter
DN40
|
Kvs
10
|
|
| NTVS40-16 |
Nominal diameter
DN40
|
Kvs
16
|
|
| NTVS40-27 |
Nominal diameterDN40 |
Kvs27 |
|
| NTVS50-6,3 |
Nominal diameterDN50 |
Kvs
6.3
|
|
| NTVS50-10 |
Nominal diameterDN50 |
Kvs
10
|
|
| NTVS50-16 |
Nominal diameterDN50 |
Kvs
16
|
|
| NTVS50-27 |
Nominal diameterDN50 |
Kvs
27
|
|
| NTVS50-39 |
Nominal diameterDN50 |
Kvs
39
|
|
| NTVS65-16 |
Nominal diameterDN65 |
Kvs
16
|
|
| NTVS65-27 |
Nominal diameterDN65 |
Kvs
27
|
|
| NTVS65-39 |
Nominal diameterDN65 |
Kvs
39
|
|
| NTVS65-63 |
Nominal diameterDN65 |
Kvs
63
|
|
| NTVS80-100 |
Nominal diameterDN80 |
Kvs100 |
|
| NTVS100-160 |
Nominal diameterDN100 |
Kvs160 |
|
| NTVS125-215 |
Nominal diameterDN125 |
Kvs215 |
|
| NTVS150-410 |
Nominal diameterDN150 |
Kvs410 |
|
