 |
| LKC-2,
non-return valve. |
Application
Non-return valve LKC-2 is designed for use in stainless
steel pipe installations to prevent reverse flow.
Working principle
LKC-2 opens when the pressure below the valve plug exceeds
the pressure above the plug and the spring force.
The valve closes when pressure equalization has been achieved. A higher
counter pressure will press the valve plug against the seat.
Standard Design
The valve body is in two parts, assembled by means of a
clamp ring and hygienically sealed with a special seal ring. A guide disc
and four legs guide the spring loaded valve plug with an O-ring seal.
LKC-2 has welding ends for ISO or DIN connections.
Materials
| Steel parts: |
Stainless steel 1.4301 (304) or acid-resistant steel 1.4404
(316L). |
| Seal rings: |
EPDM rubber. |
| Finish: |
Semi bright. |
Connections
The valve is available with welding ends for tubes
according to ISO and DIN 11850.
Technical data
Required differential pressure for opening the valve when
fitted in a vertical pipe, as shown in fig. 3, is approx. 6 kPa (0.06
bar).
| Max. product pressure: |
1000 kPa (10 bar). |
| Max. temperature: |
140°C (EPDM). |
| Min. temperature: |
-10°C. |
Option
- - Product wetted seal rings of Nitrile (NBR) or Fluorinated rubber
(FPM).
Ordering
Please state the following when ordering:
- - Size.
- - Steel grade, 1.4301 (304) or 1.4404 (316L).
- - Connections, if not welding ends.
- - Rubber grade if not EPDM.
Pressure drop/capacity diagram
Fig.1. Note!
For the diagram the following applies:
Medium: Water (20°C).
Measurement: In accordance with VDI 2173.
Dimensions (mm)
 |
 Fig.3
1 = Flow direction.
Shows the optimal built-in situation. Other positions permitted are
e.g. horizontal. The four guide legs of the valve cone ensures good
alignment.
90° rotation. |
| Fig. 2. Dimensions. |
|
|
Size |
25 |
38 |
51 |
63.5 |
76.1 |
101.6 |
DN |
DN |
DN |
DN |
DN |
DN |
DN |
|
|
mm |
mm |
mm |
mm |
mm |
mm |
25 |
32 |
40 |
50 |
65 |
80 |
100 |
| A |
62.5 |
75.0 |
87.5 |
95.0 |
115 |
155 |
62.5 |
75.0 |
75.0 |
87.5 |
95.0 |
115 |
155 |
|
OD |
25.4 |
38.4 |
51.4 |
63.9 |
76.4 |
102 |
30.0 |
36.0 |
42.0 |
54.0 |
70.0 |
85.0 |
104 |
| ID |
22.5 |
35.5 |
48.5 |
60.5 |
72.0 |
97.6 |
26.0 |
32.0 |
38.0 |
50.0 |
66.0 |
81.0 |
100 |
|
t |
1.45 |
1.45 |
1.45 |
1.7 |
2.2 |
2.2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
| H |
72.0 |
85.5 |
99 |
127 |
138 |
164 |
72.0 |
85.5 |
85.5 |
99 |
127 |
138 |
164 |
|
Weight (kg) |
0.5 |
0.7 |
1.0 |
1.7 |
2.4 |
4.3 |
0.5 |
0.7 |
0.7 |
1.0 |
1.7 |
2.4 |
4.3 |
|
