Contact Platform Support
Help CenterDanfoss Liquid Level Regulating Valves Types SV1-3 and SV4 Floating Ball Valves
Related Products
-
Danfoss Liquid Level Switch Type AKS 38 Float Level Switch Motel 148H3194CNY 3588 - 3688MOQ: 1 Unit -
Danfoss Strainers Type FIA15-20 FIA32-40 FIA50-65 FilterUS$ 1388 - 2888MOQ: 1 Unit
-
Danfoss Filters Type FIA80-100 FIA150-200 FIA250-300 StrainersUS$ 4888 - 9888MOQ: 1 Unit
-
Danfoss Strainer Insert 150µ 148H3125 148H3130-3119 Strainer FilterUS$ 888 - 1388MOQ: 1 Unit
-
Danfoss Strainer Type FA15 FA20 006-1013 FiltersUS$ 888 - 988MOQ: 1 Unit
Danfoss Liquid level regulating valves types SV1-3 and SV4 Floating ball valves Design / Function
SV 1 – 3 float has 2 different pilot connections:S-port (series connection with PMFH) or P-port(parallel connection with the PMFH).
P-port:
When using the P-port, it is possible to force open the PMFH valve to a fully open position. This is practical for service purposes or to confirm if the float has sufficient capacity for the PMFH and the operating conditions. However, when P-port connection is used it is possible to overfill a system due to constant bleeding or unautorised tampering. In this case, it is advisable to introduce a shut off when the liquid level reaches a preset point. Shut off can be done via an electrical switch if an EVM valve is mounted in the SII port in the top of the PMFH. It is only advisable to use the P-port at low pressure difference.
S-port:
The S-port offers the advantage of a preorifice which divides the pressure drop and any wear possibility due to cavitation. S-port connection must be used at high pressure differences, dp > 10 bar (145 psi). The K v (C v ) value of the SV is higher using P-port than using S-port. A higher P-band can thus be obtained.
Danfoss Liquid level regulating valves types SV1-3 and SV4 Floating ball valves Sizing
Sizing example for PMFL
Refrigerant
R 717 (NH 3 )
Evaporator capacity
Q e = 600 kW
Evaporating temperature
t e = -10 °C (∼ p e = 2.9 bar abs.)
Condensing temperature
t c = 30 °C (∼ p c = 11.9 bar abs.)
Liquid temperature ahead of valve
t l = 20 °C at max. capacity
Subcooling
∆t sub = t c - t l = 30 - 20 °C = 10 K
Calculations do not take into account pressure
loss in pipelines.
Pressure drop across valve
∆p = p c - p e = 11.9 - 2.9 bar = 9 bar
Correction factor for 10 K subcooling
0.98
Corrected capacity
600 kW × 0.98 = 588 kW
The corrected capacity can be found in the
capacity table. It will be seen from the table that
valve type PMFL 80-4 should be chosen.
Refering to “ordering table”, code number
027F0053 can be found.
For details of flanges, accessories and pilot valve,
see the ordering table.
Since ∆p = 9 bar and ∆t sub = 10 K, it will be
seen from the “C/w strong spring set” for PMFL
that a “STRONG” spring set must be used. The
pilot line is connected to SV at connection S.
In the ordering table the code number for the
spring set can be found: 027F0118.
Sizing example for PMFH
Refrigerant
R 717 (NH 3 )
Evaporator capacity
Q e = 2200 kW
Evaporating temperature
t e = -10 °C (∼ p e = 2.9 bar abs.)
Condensing temperature
t c = 30 °C (∼ 11.9 bar abs.)
Liquid temperature ahead of valve
t l = 20 °C
Subcooling
∆t sub = t c - t l = 30 - 20 °C = 10 K
Calculations do not take into account pressure
loss in pipelines.
Pressure drop across valve
∆p = p c - p e = 11.9 - 2.9 bar = 9 bar
Correction factor for 10 K subcooling
0.98
Corrected capacity
2200 kW × 0.98 = 2156 kW
The corrected capacity can be found in the
capacity table. It will be seen from the table that
valve type PMFH 80-7 should be chosen.
In the ordering table the code number for the
valve can be found: 027F3060 for CE-approved
valve.
For details of flanges, accessories and pilot
valve, see the ordering table.
Type Connection Code no.
Float pilot valve
type SV
Balance tube
liquid / vapour
Pilot line SV 1:
027B2021
027B2021CE 2 )
SV 3:
027B2023
027B2023CE 2 )
1 in.
weld
Ø 6.5 / Ø 10 mm
weld 1 )
1 ) 3 ⁄ 8 in. flare connection can be supplied under code no. 027B2033.
2 ) Approved and CE-marked in accordance with Pressure Equipment Directive - 97/23/EC.
Valve type
Orifice
diameter
Code no.
Code no.
without
housing 1 )
SV 4 Ø 3.0 mm 027B2024 2 ) 027B2014 2
Send Inquiry to This Supplier
You May Also Like
-
Danfoss Types PMFL80-3467 PMFL125 Liquid Level Regulating ValvesCNY 6888 - 8888MOQ: 1 Unit
-
Liquid Level Regulating Valves Types PMFL200 and PMFL300 Danfoss ValvesCNY 12888 - 13888MOQ: 1 Unit
-
Liquid Level Sensor Type AKS 4100/4100U,084H4521 Danfoss SensorsCNY 9888 - 12888MOQ: 1 Unit
-
Pilot-operated Servo Valve Types ICS1-20-25/ICS32-40 Danfoss Servo ValveCNY 2188 - 4888MOQ: 1 Unit
-
Danfoss Types ICS3-65,ICS3-100 and ICS3-150 Pilot-operated Servo ValveCNY 7888 - 29888MOQ: 1 Unit
-
Danfoss Pilot-operated Servo Valve Types PM1-32-40,PM3-65-80,PM3-100-150CNY 2188 - 33888MOQ: 1 Unit
-
Danfoss Types ICM20-A,ICM25-32,ICM40 Motor Operated ValvesCNY 6188 - 8888MOQ: 1 Unit
-
Danfoss Motor Operated Valves Types ICM65-100,ICM125-150 Electric ValvesCNY 13888 - 35888MOQ: 1 Unit
-
Danfoss Actuator Types ICAD600-900,ICAD1200A Electric Valves ActuatorCNY 8888 - 12888MOQ: 1 Unit
-
Pressure Transmitter Types AKS 32 and AKS 33 Danfoss Pressure SensorsUS$ 1288 - 1388MOQ: 1 Unit
