Single-stage PTCs (Gifford-McMahon type) for cooling temperatures of 25-120 K Two-stage PTC (Gifford-McMahon type) for cooling temperatures near 4 K High-frequency small-size PTCs (Stirling type)
	Single-stage PTCs (Gifford-McMahon type) for cooling temperatures of 25-120 K Cold head and rotary valve are separated by a flexible tube in order to reduce vibration and noise from the rotary valve motor.
	Cold head Compressor input power (nominal) No-load temperature Cooling power PTS8030-SO 1.8 kW (220 V) 35 K 33 W @ 80 K PTS8030-DI 1.8 kW (220 V) 20 K 30 W @ 60 K PTS2530-DI 4 kW (380 V) < 20 K 45 W @ 40 K PTS2530-DI 6 kW (380 V) < 20 K 38 W @ 30 K PTS2530-DI 12 kW (380 V) < 20 K 55 W @ 30 K
	Applications of single-stage PTCs: Small scale air/nitrogen liquefaction Detector cooling Cooling of high temperature superconductors (motors, magnets, etc.) Radiation shield cooling
	Two-stage PTCs (Gifford-McMahon type) for cooling temperatures near 4 K
	Our two-stage pulse tube coolers employ a flexible split line between rotary valve and cold head (length of split line: 0.5-1.0 m) Advantages:   Reduction of residual vibrations and EMI from rotary valve Easy replacement of rotary valve
	Cooling powers Cold head Compressor input power (nominal) No-load temperature Cooling power of 2nd stage*) PTD405 6 kW (380 V) < 2.6 K 0.5-0.7 W @ 4.2 K *) PTD404 4 kW (380 V) < 2.8 K 0.4-0.5 W @ 4.2 K *) PTD402 1.7 kW (220 V) < 3 K 0.15-0.2 W @ 4.2 K *) *) Depending on cooler adjustment
	Applications: Small scale helium liquefaction Cryogenic sensors Dry cooling of superconducting magnets Precooling of sub-Kelvin cooling stages (He-3, dilution refrigerators etc.)
	High-frequency small-size PTCs (Stirling type)
	Different PTC cold heads for operation on commercial linear compressors have been developed. Examples: PTC PT03D with SL200 linear compressor of AEG INFRAROT MODULE GmbH (Heilbronn, Germany)
	Cooling power with 100 W of electrical input 3 W @ 80 K
	PTC PT05 designed for operation with the Polar SC compressor of Leybold Vakuum GmbH (Cologne,Germany)
	Cooling power with 200 W of electrical input 6.4 W @ 80 K