1. SF2 TYPE SINGLE SPRING SAFETY VALVE
Description:
  The SF2 type is a single spring flanged safety valve suitable for steam, hot and cold water at medium pressure sets (3 to 15 kfg/cm2).  

 
 
Limiting Conditions :
  Maximum allowable pressure 15 kgf/cm2
  Minimum allowable pressure 3 kgf/cm2
  Maximum allowable temperature 5 to +225 °C
  End connection inlet and outlet Flanged PN16
 Maximum cold hydraulic pressure test 30 kgf/cm2

Dimensions/Weights (mm/kg):
Connection L1 L2 H d Weight
Inlet Outlet
DN 40 DN 40 120 100 325 40 16
DN 50 DN 50 120 100 330 50 17
 

Operating Range:


 45 to 213 psi by the order

 Note: 150 psi set pressure is always available. Other pressure sets will be available on request.

Sizes and Pipe Connections:


 Inlet sizes include DN 40, 50 flanged PN 16 (DIN 2502 - UNI 2229).


Materials :
No. Part Material
1 Bonnet G.G. 25
2 Cap Gray Cast Iron
3 Lever Gray Cast Iron
4 Pin C.S. Galva
5 Nut C.S. Galva
6 Gasket S.S. 304
7 Adjusting Bolt Brass
8 Adjusting Nut Brass
9 Spindle ST37 Galva
10 Spring Washer Up Gray Cast Iron
11 Spring C.S. Cadmium Plated
12 Spring Washer Down Gray Cast Iron
13 Disc Rod S.S. 304 or 316
14 Nut C.S. Galva
15 Spring Gasket C.S. Galva
16 Stud Bolt C.S. Galva
17 Guide Brass
18 Disc S.S. 430 or 316
19 Seat S.S. 430 or 316
20 Body G.G. 25
21 Split Pin C.S.
22 Nut & Bolt C.S. Galva
23 Pin S.S.
24 Name Plate Aluminum
   

Safety Valves Capacities For Steam (Kg/h) :
3 4 6 8 10 15
  40 800 1000 1400 1800 2200 3200
  50 1100 1400 2000 2600 31000 4600

Safety Valves Capacities For Hot and Cold Water (103 Kg/h) :
3 4 6 8 10 15
  40 6 7 8 10 12 15
  50 10 11 14 17 19 24

Calculation Formula for Relieving Capacity :

 Considering thermal input of the vessel
 W= 0.840 X 10 -3Q
 W= Relieving capacity (kg/h)
 Q= Thermal input (kcal/h)



Installation:

The Safety valve should always be fitted with the center line of the spring housing vertically above the valve.

Note: The condensed drain must be fitted.

How to Order:

Example: DN40 - SF2, inlet set 70 psi for cold water.

Design and specifications are subject to change without notice.
 
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