Here you will find a brief comparison table between 30/50 vs 40/60 pressure switches that used in water systems.
| 30/50 pressure switch | 40/60 pressure switch | |
|---|---|---|
| Model |  Square D FSG2J21M4CP |  Square D FSG2J24CP |
| Suitable | - Jet pumps - Submersible pumps - Reciprocating pumps | - Jet pumps - Submersible pumps - Reciprocating pumps |
| Usage | Single level home or a two story homes | More than one level homes |
| thread opening | 1/4" - 18 NPSF | 1/4" |
| Item Weight | 14.4 ounces | 13 ounces |
| Product Dimensions | 2.78 x 3.76 x 2.8 inches | 5 x 5 x 8 inches |
| Turn OFF pressure | 30 PSI | 40 PSI |
| Turn OFF pressure | 50 PSI | 60 PSI |
| Plating | Chromate 3 | Chromate 3 |
| Cover color | Silver | Dark Green |
| Setting instructions | User manual and Cover label | User manual and Cover label |
| modifications and special features | Supported | Supported |
| Secure grounding | Yes | Yes |
| electrical life | 100,000 cycles | 100,000 cycles |
| Lead content restrictions | California AB1953 | California AB1953 |
| Bug protect plug | Yes | Yes |
| Action | Standard Action | Standard Action |
| Application | To control electrically driven water pumps | To control electrically driven water pumps |
| Actuator Type | Diaphragm | Diaphragm |
| Differential Type | Adjustable | Adjustable |
| Approvals | - UL Listed File: E12158 CCN NKPZ - CSA Certified File: LR25490 | - UL Listed File: E12158 CCN NKPZ - CSA Certified File: LR25490 |
| Contact Arrangement | DPST | DPST |
| Enclosure Rating | NEMA 1 | NEMA 1 |
| Depth | 2.78 Inches | 2.78 Inches |
| Diaphragm | Nitrile (Buna N) | Nitrile (Buna N) |
| Differential | 15 to 30 PSIG | 15 to 30 PSIG |
| Enclosure Type | General Purpose (Indoor) | General Purpose (Indoor) |
| Marketing Trade Name | N/A | Pumptrol |
| Flange Material | Zinc Plated Steel | Zinc Plated Steel |
| Maximum Voltage Rating | 575VAC | 575VAC |
| Horsepower Rating (3-Phase) | - 2HP@115VAC - 3HP@230VAC - 1HP@460/575VAC | - 2HP@115VAC - 3HP@230VAC - 1HP@460/575VAC |
| Horsepower Rating (1-Phase) | - 1.5HP@115VAC - 2HP@230VAC | - 1.5HP@115VAC - 2HP@230VAC |
| Maximum Allowable Pressure | 220 PSIG | 220 PSIG |
| Mounting Type | Bracket | Bracket |
| Number of Poles | 2-Pole | 2-Pole |
| Pressure Connection | 0.25 Inch NPSF | 0.25 Inch NPSF |
| Pressure Setting | 30 to 50 PSIG | 40 to 60 PSIG |
| Range on Decreasing Pressure | 10 to 45 PSIG | 10 to 45 PSIG |
| Range on Increasing Pressure | 20 to 65 PSIG | 20 to 65 PSIG |
| Terminal Type | Screw Clamp | Screw Clamp |
| Type | F | F |