Thermostatic expansion valves PHT
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1 MAKING MODERN LIVING POSSIBLE Technical brochure Thermostatic expansion valves PHT
2 Contents Page Introduction Features Technical data Ordering - Components Pilot orifice assembly Valve body, flange gaskets, flange bolts and screws Thermostatic element (incl. accessory bag with screws) Flange set Design - Function Identification Capacity: R / 07C R07C Ra R0A / R Dimensions and weights DKRCC.PD.AF0.A.0-50H58 Danfoss A/S (AC-SMC / mr), 08-00
3 Introduction PHT thermostatic expansion valves regulate the injection of refrigerant liquid into evaporators. Injection is controlled by the refrigerant superheat. Therefore the valves are especially suitable for liquid injection in dry evaporators where the superheat at the evaporator outlet is proportional to the evaporator load. Features Range: 0 to +50 C Equally applicable to freezing, refrigeration and air conditioning plant. Interchangeable orifice assembly - easier stocking - easy capacity matching - better service. Very tight main orifice Also used as solenoid valve (not PHT 00) - see the section "Design - Function" Rated capacities from 05 to 890 kw (0 to 50 TR) for R Can be supplied with MOP (Max. Operating Pressure) Protects the compressor motor against excessive evaporating pressure. Patented double contact bulb Fast and easy to install. Good temperature transfer from pipe to bulb. Technical data Refrigerants R, R70C, Ra, R0A / R507 Max. temperature Bulb, when valve is installed: 00 C Bulb, element not mounted: 60 C Min. temperature 50 C Max. test pressure PHT 85 and 5: PT = bar PHT 00: PT = 8 bar Maximum working pressure PHT 85 and 5: PS / MWP = 8 bar PHT 00: PS / MWP = 0 bar Superheat Static superheat SS can be adjusted with setting spindle ( ). The standard superheat setting SS is K. Danfoss A/S (RA-SMC / mr), DKRCC.PD.AF0.A.0-50H58
4 Ordering Components. Orifice assembly for pilot valve. Valve body, flange gaskets, flange bolts and screws. Thermostatic element (incl. accessory bag with screws). Flange set PHT 85 Solder or weld flanges. Pilot orifice assembly Type PHT Code no. 067B790. Valve body, flange gaskets, flange bolts and screws Type Orifice no. Rated capacity ) R/ 07C Range N: 0 to +0 C Range N: 0 to +0 C Rated capacity ) Ra Range A: +0 to +50 C TR kw TR kw TR kw PHT H60 PHT H6 PHT H6 PHT H6 PHT H6 PHT H065 PHT H066 ) A PHT 85 with orifice no. 5 and a capacity of +5 +0% compared to orifice no. can be ordered. The code no. is 06H87. ) The rated capacity for range N is based on evaporating temperature t e = +5 C, condensing temperature t c = + C, and refrigerant liquid temperature ahead of valve t l = +8 C. The rated capacity for range A is based on evaporating temperature t e = +5 C, condensing temperature t c = + C, and refrigerant liquid temperature ahead of valve t l = +8 C. See following pages for extended capacity tables. Code no.. Thermostatic element (incl. accessory bag) Range Refrigerant Code no. m capillary tube 5 m capillary tube 0 to +0 C R/ R07C 067B0 067B0 R/ R07C, MOP 00 psig 067B00 067B06 R07C 067B 067B R07C, MOP 95 psig 067B Ra 067B0 067B5 Ra, MOP 55 psig 067B6 067B7 R0A / R B9 +0 to +50 C Ra 067B8. Flange set Valve flange Flange type Weld flanges Solder flanges in. Code no. in. Code no. mm Code no. PHT 85 07N05 PHT 85 /8 07L L08 PHT 85 /8 07L L05 PHT 5 A / 07N0 PHT 00 A / 07N00 PHT 00 A 07N050 DKRCC.PD.AF0.A.0-50H58 Danfoss A/S (AC-SMC / mr), 08-00
5 Design Function General PHT valves have an interchangeable orifice assembly. PHT valves are built up of three interchangeable main components: I. Thermostatic element, pos. II. Orifice assembly, pos. III. Valve body with connections, pos. Including Insert, pos. 7 For the same valve type and refrigerant, the associated orifice assembly is suitable for all vers ions of valve body and in all evaporating temperature ranges. The charge in the thermostatic element depends on the evaporating temperature range. A teflon valve plate (pos. 0) in the main valve (not PHT 00) ensures a tight main orifice. All valves with external pressure equalization (pos. 5). The double contact bulb gives fast and precise reaction to temperature changes in the evaporator. It also makes fitting the bulb quick and easy. The valves are able to withstand the effects that normally occur with hot gas defrosting. To ensure long operating life, the valve cone and seat are made of a special alloy with particularly good wear qualities.. Thermostatic element (diaphragm). Interchangeable orifice assembly. Valve body. Superheat setting spindle (see instructions) 5. Ext. pressure equalizing connection with / in./6 mm flare nut 6. Pilot connection 7. Insert in main valve 8. Main spring 9. Bottom plug 0. Teflon valve plate PHT 85 To obtain a completely tight system an EVR must be installed in the equalization line. Identification The thermostatic element is fitted with a label (on top of the diaphragm).the code refers to the refrigerant for which the valve is designed: X = R / R07C Z = R07C N = Ra S = R0a / R507 The label gives valve type, evaporating temperature range, MOP point, refrigerant, and max. test pressure, PB/MWP. Thermostatic element label Danfoss A/S (RA-SMC / mr), DKRCC.PD.AF0.A.0-50H58 5
6 Capacity Capacity in kw for range N: 0 C to +0 C Valve type PHTX 5 PHTX 00 PHTX 00 PHTX 5 PHTX 00 PHTX 00 PHTX 5 PHTX 00 PHTX 00 Orifice no. R / R07C Evaporating temperature +0 C Evaporating temperature 0 C Evaporating temperature 0 C Evaporating temperature 0 C Evaporating temperature 0 C Evaporating temperature 0 C for subcooling Δt sub The evaporator capacities used must be corrected if subcooling deviates from K. The corrected capacity can be obtained by dividing the required evaporator capacity by the correction factor below. Selections can then be made from the tables above. Note: Insufficient subcooling can produce flash gas. Δt sub K 0 K 5 K 0 K 5 K 0 K 5 K 0 K 5 K 50 K factor Example Refrigerant = R Evaporator capacity Q e = 0 kw Subcooling = 0 K factor from table =.06 Corrected capacity = 0 :.06 0 kw 6 DKRCC.PD.AF0.A.0-50H58 Danfoss A/S (AC-SMC / mr), 08-00
7 Capacity Capacity in kw for range N: 0 C to +0 C Valve type PHTZ 5 PHTZ 00 PHTZ 00 PHTZ 5 PHTZ 00 PHTZ 00 PHTZ 5 PHTZ 00 PHTZ 00 Orifice no. R07C Evaporating temperature +0 C Evaporating temperature 0 C Evaporating temperature 0 C Evaporating temperature 0 C Evaporating temperature 0 C Evaporating temperature 0 C for subcooling Δt sub The evaporator capacities used must be corrected if subcooling deviates from K. The corrected capacity can be obtained by dividing the required evaporator capacity by the correction factor below. Selections can then be made from the tables above. Note: Insufficient subcooling can produce flash gas. Δt sub K 0 K 5 K 0 K 5 K 0 K 5 K 0 K 5 K 50 K factor Danfoss A/S (RA-SMC / mr), DKRCC.PD.AF0.A.0-50H58 7
8 Capacity Capacity in kw for range N: 0 C to +0 C PHTN 5 PHTN 00 PHTN 00 PHTN 5 PHTN 00 PHTN 00 PHTN 5 PHTN 00 PHTN 00 Valve type Orifice no. Ra Evaporating temperature +0 C Evaporating temperature 0 C Evaporating temperature 0 C Evaporating temperature 0 C Evaporating temperature 0 C Evaporating temperature 0 C Capacity in kw for range A: +0 C to +50 C Evaporating temperature +50 C PHTN 5 PHTN 00 PHTN 00 PHTN 5 PHTN 00 PHTN 00 PHTN 5 PHTN 00 PHTN 00 PHTN 5 PHTN 00 PHTN Evaporating temperature +0 C Evaporating temperature +0 C Evaporating temperature +0 C Evaporating temperature +0 C Evaporating temperature 0 C Evaporating temperature 0 C for subcooling Δt sub The evaporator capacities used must be corrected if subcooling deviates from K. The corrected capacity can be obtained by dividing the required evaporator capacity by the correction fac tor below. Selections can then be made from the tables above. Note: Insufficient subcooling can produce flash gas. Δt sub K 0 K 5 K 0 K 5 K 0 K 5 K 0 K 5 K 50 K factor DKRCC.PD.AF0.A.0-50H58 Danfoss A/S (AC-SMC / mr), 08-00
9 Capacity Capacity in kw for range N: 0 C to +0 C Valve type PHTS 5 PHTS 00 PHTS 00 PHTS 5 PHTS 00 PHTS 00 PHTS 5 PHTS 00 PHTS 00 Orifice no. R0A / R Evaporating temperature +0 C Evaporating temperature 0 C Evaporating temperature 0 C Evaporating temperature 0 C Evaporating temperature 0 C Evaporating temperature 0 C for subcooling Δt sub The evaporator capacities used must be corrected if subcooling deviates from K. The corrected capacity can be obtained by dividing the required evaporator capacity by the correction factor below. Selections can then be made from the tables above. Note: Insufficient subcooling can produce flash gas. Δt sub K 0 K 5 K 0 K 5 K 0 K 5 K 0 K 5 K 50 K factor Danfoss A/S (RA-SMC / mr), DKRCC.PD.AF0.A.0-50H58 9
10 Dimensions and weights 5m capillary tube: PHT 85 Solder or weld flanges Weight.5 kg 5m capillary tube: 5m capillary tube: PHT 5 Weld flanges Weight 9.5 kg PHT 00 Weld flanges Weight 5.5 kg 0 DKRCC.PD.AF0.A.0-50H58 Danfoss A/S (AC-SMC / mr), 08-00
11 Danfoss A/S (RA-SMC / mr), DKRCC.PD.AF0.A.0-50H58
12 DKRCC.PD.AF0.A.0-50H58 Danfoss A/S (AC-SMC / mr), 08-00
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