R
Type 66, 66Z, and 66ZZ Table 1. Specifications Outlet Pressure Ranges(1)
End Connections and Ratings(1) BODY SIZE, (INCH)
BODY MATERIAL Cast Iron
OUTLET PRESSURE RANGES Steel
2
Screwed, Flat-face Class 125 flanged
Screwed, Raised-face and Flat-face Class 150 flanged, Raised-face Class 300 flanged
3, 4
Flat-face Class 125 flanged
Raised-face Class 150 flanged
Maximum Allowable Pressures(1) Maximum Safe Inlet Pressure to Avoid Internal Part Damage: J 10 psig (0.69 bar) for Type 66 J 5 psig (0.34 bar) for Type 66Z and J 2 psig (0.14 bar) for Type 66ZZ Maximum Operating Inlet Pressure(2) Recommended for Good Performance: J 5 psig (0.34 bar) for Types 66 and 66Z and J 2 psig (0.14 bar) for Type 66ZZ Emergency Inlet(3): 25 psig (1.7 bar) Emergency Outlet(3): 8 psig (0.6 bar) Material Temperature Capabilities(1) -20 to 180째F (-29 to 82째C) Pressure Registration Internal (cast iron body) or external control line (steel body) 1. Pressure/temperature limits and any applicable codes should not be exceeded. 2. Service pressures exceeding inlet pressure may cause improper regulator operation.
Inches w.c. Unless Otherwise Designated
Type
4 to 11 8 to 28 2 to 5 4 to 8 7 to 12 10 to 17 14 to 28 0.75 to 1.5 psig
66
1 to 2 psig 1.5 to 3 psig 3 to 5 psig -1 to +2
66Z 66ZZ 66 Series vacuum regulators or breakers
Millibar 10 to 27 20 to 70 5 to 12 10 to 20 17 to 30 25 to 42 35 to 70 52 to 103 69 to 138 103 to 207 207 to 345 -2.5 to +5
-0.25 to +0.25
-0.6 to +0.6
0 to -2 -0.3 to -0.8 -2 to -6 0 to +1.5
0 to -5 -0.7 to -2 -5 to -15 0 to +3.7
Control Line Connection 3/4-inch NPT Approximate Weight 2-Inch Screwed: 50 lb (22.5 kg) 2-Inch Flanged: 55 lb (24.8 kg) 3-Inch Flanged: 100 lb (45.3 kg) 4-Inch Flanged: 155 lb (69.8 kg) 3 Service pressures exceeding emergency inlet or outlet pressure may cause damage to internal parts or bursting of pressure-containing parts. 4. Must have 1 psig (69 mbar) minimum differential.
CAUTION Regulator operation within table 1 limits and applicable codes does not eliminate the possibility of damage from external sources or from debris in the line. The regulator should be inspected for damage regularly and after any condition exceeding table 1 limits. 14A1901-A
Complete downstream protection is needed with a Type 66, 66Z, or 66ZZ regulator if the actual inlet pressure can exceed the regulator outlet pressure rating or the pressure ratings of any downstream equipment. Provide adequate overpressure protection for the regulator and any downstream equipment. Make sure that there is no damage to or foreign material in the regulator and that all tubing and piping is clean and unobstructed. Install the regulator so that flow through it 2
13A0496-C
Figure 2. Typical Nameplates
matches the arrow marked on the regulator body. Some typical 66 Series regulator installations are shown in figures 3, 4 and 5.