| SMP-SC Sanitary Mixproof Valve |
 |
| SMP-SC
valve with body combination 22-90. |
Application
SMP-SC is a sanitary pneumatic seat valve, designed for
mixproof operation when two different products flow through only one
valve. The valve is for use in stainless steel pipe systems.
Working principle
SMP-SC is remote-controlled by means of compressed air.
The valve is a normally closed (NC) valve.
The valve has two independent plug seals, forming a leakage chamber
between them under atmospheric pressure during every working condition.
Leaking product flows into the leakage chamber and is discharged through
the leakage outlet. When the valve is open the leakage chamber is closed.
The product can then flow from one line to the other.
The valve can be cleaned by CIP (see fig. 1).
SMP-SC is fitted with a balancing cylinder in the lower part of the valve
body, which makes it insensitive to high pressure and water hammer.
Standard design
The valve consists of two bodies, which are welded
together. The seats for the upper and lower plugs are located between the
bodies.
The valve has an external actuator, which is clamped to the top of the
valve body.
The actuator and the internal parts can be removed without any
interference with the pipelines.
All the seals and the guide rings can be serviced.
SMP-SC, sizes DN125-150 are very heavy. Therefore it is recommended to
manufacture and use auxiliary lifting equipment. Guidelines are given in
IM 70787. The recommended auxiliary equipment cannot be supplied by Alfa
Laval.
Option - Three-body version
SMP-SC is available in a three-body version. The valve is
for use as a mixproof change-over valve.
The valve consists of the standard actuator, the standard
balancing housing, the standard clamps, the standard seals and guide rings
and the standard valve body onto which the lower valve body is clamped.
The upper and the lower plugs and the balancing
cylinder/plug unit are fitted with seal rings.
| |
|
 |
 |
| a. Closed valve |
b. Open valve (air to AC2) |
|
 |
| c. Cleaning of lower seat (air to AC3) |
d. Cleaning of upper seat (air to AC1) |
| Fig. 1. Operation/cleaning |
|
Valve body combinations
Fig. 2
Valve body combinations for three-body version (Lower
valve body)
Fig. 3
Balancing housing with CIP connections - three-body
version
The balancing housing of SMP-SC is available with CIP
connections.
The CIP connections are screwed onto the balancing housing
and fixed by means of Loctite.
Fig. 4
Ordering
Please state "CIP connections" in the valve specification.
| Dimensions (mm) |
|
Size |
51 |
63.5 |
76.1 |
101.6 |
50 |
65 |
80 |
100 |
125 |
150 |
|
|
mm |
mm |
mm |
mm |
DN |
DN |
DN |
DN |
DN |
DN |
| A |
557.2 |
589.2 |
601.2 |
809.2 |
557.2 |
589.2 |
771.7 |
809.7 |
769.7 |
819.7 |
|
C |
82 |
98 |
104 |
136 |
82 |
98 |
117 |
136 |
167 |
192 |
| OD |
51 |
63.5 |
76.1 |
101.6 |
53 |
70 |
85 |
104 |
129 |
154 |
|
ID |
48.6 |
60.3 |
72.9 |
97.6 |
50 |
66 |
81 |
100 |
125 |
150 |
| t |
1.2 |
1.6 |
1.6 |
2.0 |
1.5 |
2.0 |
2.0 |
2.0 |
2.0 |
2.0 |
|
E |
128.6 |
134.4 |
140.3 |
177 |
129.3 |
137.3 |
168.5 |
178 |
180.8 |
193.3 |
| F |
31 |
31 |
31 |
36 |
31 |
31 |
36 |
36 |
55 |
55 |
|
G |
110 |
110 |
110 |
110 |
110 |
110 |
110 |
110 |
150 |
150 |
| H |
128 |
128 |
128 |
166 |
128 |
128 |
166 |
166 |
199 |
199 |
|
M/ISO clamp |
21 |
21 |
21 |
21 |
|
|
|
|
|
|
| M/ISO male |
21 |
21 |
21 |
21 |
|
|
|
|
|
|
|
M/DIN male |
|
|
|
|
21 |
24 |
29 |
29 |
34 |
40 |
| M/SMS male |
19 |
23 |
23 |
34 |
|
|
|
|
|
|
|
M/BS male |
21 |
21 |
21 |
26 |
|
|
|
|
|
|
| Weight (kg) |
20 |
20 |
20 |
41 |
20 |
20 |
41 |
41 |
57 |
58 |
| Dimensions (mm) - three-body version |
|
Size |
51 |
63.5 |
76.1 |
101.6 |
5 |
65 |
80 |
100 |
|
|
mm |
mm |
mm |
mm |
DN |
DN |
DN |
DN |
| A |
688 |
720 |
732 |
967 |
688 |
720 |
929 |
967 |
|
C |
82 |
98 |
104 |
136 |
82 |
98 |
117 |
136 |
| C1 |
120 |
120 |
120 |
160 |
120 |
120 |
160 |
160 |
|
Weight (kg) |
24 |
24 |
24 |
47 |
24 |
24 |
47 |
47 |
Caution, opening/closing time:
Opening/closing time will be effected by the following:
- - The air supply (air pressure).
- - The length and dimensions of the air hoses.
- - Number of valves connected to the same air hose.
- - Use of single solenoid valve for serial connected air actuator
functions.
- - Product pressure.
Air Connections:
AC1, AC2, AC3: R 1/8" (BSP), internal thread.
AC1: Cleaning of upper seat.
AC2: Open valve.
AC3: Cleaning of lower seat.
 a.
51-101.6mm/DN50-100 |
 b.
DN125-150 |
 c.
Three-body version |
| |
Fig. 5 |
|
Pressure drop/capacity diagrams
Pressure drop/capacity diagrams - three-body version
NOTE!
For the diagrams the following applies:
Medium: Water (20°C)
Measurement: In according with VDI 2173.
|
CIP liquid capacities - Kv values |
| Size |
51, 63.5, 76.1 mm/DN50, 65 |
101.6 mm/DN80, 100 |
DN125, 150 |
|
Lift, upper plug |
1.5 |
2.8 |
4.2 |
| Lift, lower plug |
1.2 |
2.2 |
4.0 |
Formula to estimate CIP flow during seat lift: (for
liquids with comparable viscosity and density to water):
Q = K v · √ Δp
Q = CIP - flow (m3/h).
Kv = Kv value from the above table.
Δ p = CIP pressure (bar).
Technical data
| Max. product pressure: |
1000 kPa (10 bar). |
| Min. product pressure: |
Full vacuum. |
| Max. product pressure in upper line
(lower line: 0 bar)against which the valve can open (air pressure: 7
bar): |
700 kPa (7 bar).650 kPa (6.5 bar) for 101.6mm/DN100. |
| Temperature range: |
-10°C to +140°C (EPDM) |
| Air pressure (depending on line
pressure): |
500 to 700 kPa (5-7 bar). |
|
Air consumption (litres free air) |
| Size |
51, 63.5, 76.1 mm/DN50, 65 |
101.6 mm/DN80, 100 |
DN125,150 |
|
Lift, upper plug |
0.07 x Air press. (bar) |
0.2 x Air press. (bar) |
0.8 x Air press. (bar) |
| Lift, lower plug |
1.30 x Air press. (bar) |
3.5 x Air press. (bar) |
0.7 x Air press. (bar) |
|
Opening |
0.50 x Air press. (bar) |
0.9 x Air press. (bar) |
2.5 x Air press. (bar) |
Materials
| Product wetted steel parts: |
Acid-resistant steel 1.4401 (316L). |
| Other steel parts: |
Stainless steel 1.4301 (304). |
| Product wetted seals: |
EPDM rubber. |
| Other seals: |
Nitrile (NBR). |
| Finish: |
Semi bright. |
Options
- - Male parts or clamp liners in accordance with required standard.
- - ThinkTop®
- - Special valve port size combinations (mix size).
- - Balancing housing with CIP-connections.
- - Three-bodied version (51-101.6/DN50-100 only).
- - Surface roughness, product wetted parts: Ra≤ μ0.8 mm.
- - Product wetted seals of Nitrile (NBR) or Fluorinated rubber (FPM).
- - Service tool for the actuator (51-101.6/DN50-100 only).
- - Tool for plug seals (necessary for changing the plug seals).
Ordering
Please state the following when ordering:
- - Valve type.
- - Valve port combination: Type nos.
- - Valve port size combination,
(lower and upper ports).
- - Connections if not welding ends.
- - Other options.
Please state if the valve should be a three-body version.
 |
 |
| a. 51-101.6mm/DN50-100 |
b. DN125-150 |
| Fig. 6 Details of SMP-SC |
This product has EHEDG approval |
