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Series 225/227/228 Flanged Chamber

Adjustable Deadband 12" to 24", Pressure to 1000 psig (68.9 bar), Temperature to 475°F (246°C), Hermetically Sealed Switches Adjustable deadband, flanged chamber and side mount are featured in the heavy duty reliable 225 series. A choice of four operating styles are offered: 1. Single stage adjustable deadband suitable for pump operation; 2. Two stage operation with adjustable lower stage, fixed upper stage for pump and high alarm; 3. Fixed lower stage and adjustable upper stage for pump and low alarm; 4. Fixed upper and lower stage for high and low alarm. Alarm stages can also be used for shutdown. Adjustable level changes are available in increments of 12", 24", 36", and 48".




Minimum Specific Gravity:
Temperature Limit:
Ambient Temperature: 212°F (100°C); Process Temperature: up to 475°F (246°C).
Snap action or mercury. See charts A and B.
Electrical Ratings:
See charts A and B.
Wiring Connections:
> G, WT or E enclosure, terminal block;
EV enclosure, 18" (460 mm) leads.
1" NPT standard (1" socket weld hubs or flanges optional).
See model chart.
> G, painted steel and aluminum;
WT, painted steel, aluminum, neoprene;
E, aluminum. EV, aluminum and neoprene.
Wetted Parts:
C1 construction. Chamber, carbon steel. Float and trim 303SS, 304SS, 430SS.
225, 50 lb (22.7 kg); 227, 60 lb (27 kg); 228, 67 lb (30.4 kg).
Suggested Specifications:
Liquid level control shall be 225 (227) (228) Series with adjustable deadband of (12") (24") (36") (48"). Unit shall be external side mount type. Process connections shall be 1" NPT (socket weld hub) (flanged). Suitable for operation at 1000 psig (68.9 bar) at 100°F (38°C); 850 psig (21 bar) at 475°F (246°C) with a minimum specific gravity of 0.75. Switch mechanism shall be gravity return and shall be activated by a stainless steel float.


†Available on special order, change 1st digit in ordering code from 4 to 5 or 7 to 8, i.e., -4820 becomes -5820, -7810 becomes -8810, etc.
‡10 amp inductive (polarized) at 125 VDC.
*Electrically Independent.
**Resistive.     ◊ 30 VDC = 5 Resistive








Why is the minimum specific gravity important on the float level switches?
If a medium has a lower s.g. than the rated minimum for a float, the float will sink through the media and the switch will not operate.

Series 211/213/214 Series F6 & F7 Vertical Series 225/227/228 Series F6 & F7 Horizontal Series 291/293/294 Series L6 Series 102/1102 Series 1211/1213/1214 Series 1251/1253/1254 Series 221/223/224 Model F7-MLK2 Series L10 Model F7-MLK Series 1241/1243/1244 Series L4 Series 251/253/254 Series 123/125 Series L8 Series 1221/1223/1224 Series 215/217/218 Series 205 Series F7-MQ Series 201/203/204 Series F7-MS Series F7-MM