KVL Crankcase Pressure Regulator Valves Technical Data
Crankcase pressure regulator type KVL is fitted in the suction line ahead of the compressor.
KVL protects the compressor motor against overload during start-up after long standstill periods or after defrost periods (high pressure in evaporator).
Features
- Accurate, adjustable pressure regulation
- Wide capacity and operating ranges
- Pulsation damping design
- Stainless steel bellows
- Compact angle design for easy installation in any position
- “Hermetic” brazed construction
- Available in a wide size range of flare and ODF solder types
- KVL 12 – KVL 22: may be used in the following EX range: Category 3 (Zone 2)
| Refrigerants | R22, R1270*, R134a, R290*, R404A, R407A, R407C, R407F, R448A, R449A, R450A, R452A, R507A, R513A, R600*, R600a* * KVL 12 – KVL 22 only |
| Regulating range | 0.2 – 6 bar (2.9 – 87 psig) |
| Factory setting = 2 bar (29 psig) | |
| Maximum working pressure | PS/MWP PS = 18 bar (261 psig) |
| Maximum test pressure | Pe = 19.8 bar (287 psig) |
| Medium temperature range | -60 – 130 °C |
| Maximum P-band | KVL 12 – 22: 2 bar (29 psig) |
| KVL 28 – 35: 1.5 bar (21.7 psig) |
| Kv-value 1) with maximum P-band | KVL 12 – 22: 2.5 m3 / h |
| KVL 28 – 35: 8.0 m3 / h |
1) The Kv value is the flow of water in [m3 / h] at a pressure drop across valve of 1 bar, ρ = 1000 kg / m3.
This product (KVL 12 – KVL 22) is evaluated for R290, R600, R600a, R1270 by ignition source assessment in accordance with standard EN13463-1.
For complete list of approved refrigerants, visit www.products.danfoss.com and search for individual code numbers, where refrigerants are listed as part of technical data.
Nominal Capacity
Danfoss
Code
Number | Valve
Type | Connection Type | Rated capacity 1) [kW] |
| R22 | R134a | R404A/R507 | R407C |
| 034L0052 | KVL35 | 1-3/8" Flare | 17.8 | 13.2 | 15.9 | 16.4 |
1) Rated capacity is the regulator capacity at
evaporating temperature te = -10 °C
condensing temperature tc = +25°C
pressure drop in regulator Δp = 0.2 bar (2.9 psig)
To select the product for other conditions or refrigerants, use Danfoss Coolselector®2.
The connection dimensions chosen must not be too small, as gas velocities in excess of 40 m / s at the inlet of the regulator can result in flow noise.