Product Overview

Armstrong 11-AV, 22-AV, 13-AV series all-stainless steel free floating lever air/gas vent valves are designed specifically for positive air/gas venting in pressure environments. The product features an all-stainless steel construction that can handle both internal and external corrosive conditions. Its core technology originates from Armstrong's proven free floating mechanism used in steam traps, ensuring precise valve seating and reliable sealing under various operating conditions. This series of vent valves can operate at pressures up to 600 psig (41 bar), adapt to specific gravity as low as 0.50, and achieve flow rates up to 115 SCFM, making them ideal venting solutions for corrosive environments and high-pressure applications in industrial settings.

Core Features

1. All-Stainless Steel Construction: Body, cover, and all working components are made of high-strength corrosion-resistant stainless steel, with welded seals and no gaskets, forming a permanently sealed, tamper-proof unit.
2. Efficient Venting Performance: Elliptical float ball combined with high-leverage design enhances venting efficiency, ensuring stable venting under different pressure and specific gravity conditions.
3. Wide Operating Range: Adaptable to a wide pressure range, with minimum specific gravity as low as 0.50, meeting various medium venting requirements.
4. Stable and Reliable Structure: Lever action is precisely guided, ensuring correct valve seating under all operating conditions, extending service life.

Detailed Technical Parameters

Basic Physical Parameters

Model	Pipe Connection Size	Dimension "A" (inch/mm)	Dimension "B" (inch/mm)	Dimension "D" (inch/mm)	Dimension "K" (inch/mm)	Weight (lb/kg)
11-AV	1/2, 3/4 inch (15mm outlet)	2-3/4 / 70	7-1/4 / 184	- / -	9/16 / 14	-
22-AV	1/2, 3/4 inch	3-7/8 / 99	8-13/16 / 224	3-3/8 / 86	7/8 / 22	5 / 2.3
13-AV	1/2, 3/4 inch	4-1/2 / 114	11-3/8 / 289	6-1/8 / 156	1-3/16 / 30	7-1/2 / 3.4

Maximum Allowable Pressure (Vessel Design)

Model	100°F (38°C)	500°F (260°C)
11-AV	500 psig (34 bar)	440 psig (30 bar)
22-AV	600 psig (41 bar)	475 psig (33 bar)
13-AV	570 psig (39 bar)	490 psig (34 bar)

Maximum Working Pressure by Model (by Specific Gravity and Orifice Size)

11-AV Maximum Working Pressure

Float Ball Weight (oz/g)	Orifice Size (inch)	Specific Gravity 0.75 (psi/bar)	Specific Gravity 0.50 (psi/bar)
Standard 2.90 (82)	1/8	178 / 12	118 / 8
Standard 2.90 (82)	#38	267 / 18	177 / 12
Standard 2.90 (82)	5/64	400 / 28	311 / 21
Special 2.08 (59)	1/8	- / -	118 / 8
Special 2.08 (59)	#38	- / -	177 / 12
Special 2.08 (59)	5/64	- / -	311 / 21

22-AV Maximum Working Pressure

Float Ball Weight (oz/g)	Orifice Size (inch)	SG 1.00 (psi/bar)	SG 0.95 (psi/bar)	SG 0.90 (psi/bar)	SG 0.85 (psi/bar)	SG 0.80 (psi/bar)	SG 0.75 (psi/bar)	SG 0.70 (psi/bar)	SG 0.65 (psi/bar)	SG 0.60 (psi/bar)	SG 0.55 (psi/bar)	SG 0.50 (psi/bar)
10.0 (282)	5/16	35 / 2.4	33 / 2.3	31 / 2.2	30 / 2.0	28 / 1.9	26 / 1.8	19 / 1.3	18 / 1.2	16 / 1.1	15 / 1.0	14 / 0.9
10.0 (282)	1/4	57 / 3.9	54 / 3.7	51 / 3.5	49 / 3.4	46 / 3.2	43 / 3.0	31 / 2.1	29 / 2.0	27 / 1.8	24 / 1.7	22 / 1.5
10.0 (282)	3/16	126 / 8.7	120 / 8.2	113 / 7.8	107 / 7.4	101 / 7.0	95 / 6.5	68 / 4.7	64 / 4.4	59 / 4.1	54 / 3.7	49 / 3.4
10.0 (282)	5/32	217 / 14.9	206 / 14.2	195 / 13.5	185 / 12.7	174 / 12.0	163 / 11.2	118 / 8.1	110 / 7.6	101 / 7.0	93 / 6.4	85 / 5.8
10.0 (282)	1/8	371 / 25.6	352 / 24.3	334 / 23.0	316 / 21.8	297 / 20.5	279 / 19.2	202 / 13.9	187 / 12.9	173 / 12.0	159 / 11.0	145 / 10.0
10.0 (282)	7/64	474 / 32.7	451 / 31.1	427 / 29.5	404 / 27.9	380 / 26.2	357 / 24.6	258 / 17.8	240 / 16.5	222 / 15.3	204 / 14.0	186 / 12.8
10.0 (282)	#38	590 / 40.7	561 / 38.7	532 / 36.7	503 / 34.7	473 / 32.7	444 / 30.6	321 / 22.1	298 / 20.6	276 / 19.0	253 / 17.5	231 / 15.9
10.0 (282)	5/64	600 / 41.4	600 / 41.4	600 / 41.4	600 / 41.4	600 / 41.4	600 / 41.4	473 / 32.6	440 / 30.3	407 / 28.1	374 / 25.8	341 / 23.5

13-AV Maximum Working Pressure

Float Ball Weight (oz/g)	Orifice Size (inch)	SG 1.00 (psi/bar)	SG 0.95 (psi/bar)	SG 0.90 (psi/bar)	SG 0.85 (psi/bar)	SG 0.80 (psi/bar)	SG 0.75 (psi/bar)	SG 0.70 (psi/bar)	SG 0.65 (psi/bar)	SG 0.60 (psi/bar)
14.9 (423)	1/2	21 / 1.5	20 / 1.4	19 / 1.3	18 / 1.3	17 / 1.2	16 / 1.1	15 / 1.0	14 / 1.0	13 / 0.9
14.9 (423)	3/8	45 / 3.1	43 / 3.0	41 / 2.8	38 / 2.7	36 / 2.5	34 / 2.3	32 / 2.2	30 / 2.0	27 / 1.9
14.9 (423)	5/16	72 / 5.0	69 / 4.7	65 / 4.5	61 / 4.2	58 / 4.0	54 / 3.8	51 / 3.5	47 / 3.3	44 / 3.0
14.9 (423)	9/32	96 / 6.6	91 / 6.3	87 / 6.0	82 / 5.6	77 / 5.3	72 / 5.0	68 / 4.7	63 / 4.3	58 / 4.0
14.9 (423)	1/4	144 / 9.9	137 / 9.4	130 / 8.9	123 / 8.5	116 / 8.0	109 / 7.5	102 / 7.0	94 / 6.5	87 / 6.0
14.9 (423)	7/32	206 / 14	196 / 13	186 / 13	176 / 12	165 / 11	155 / 10.7	145 / 10.0	135 / 9.3	125 / 8.6
14.9 (423)	3/16	309 / 21	294 / 20	279 / 19	264 / 18	249 / 17	234 / 16	218 / 15	203 / 14	188 / 13
14.9 (423)	5/32	484 / 33	460 / 32	437 / 30	413 / 28	389 / 27	365 / 25	342 / 24	318 / 22	294 / 20
14.9 (423)	1/8	570 / 39	570 / 39	570 / 39	570 / 39	570 / 39	570 / 39	570 / 39	570 / 39	570 / 39
14.9 (423)	7/64	570 / 39	570 / 39	570 / 39	570 / 39	570 / 39	570 / 39	570 / 39	570 / 39	570 / 39

Note: If the actual specific gravity falls between the values in the table, use the parameters corresponding to the next lower specific gravity (e.g., if the actual specific gravity is 0.73, refer to the 0.70 specific gravity data).

Weight Details

Model	Weight (lb)	Weight (kg)
11-AV	-	-
22-AV	5	2.3
13-AV	7-1/2	3.4

Component Material Details

Model	Valve and Seat	Lever System	Float Ball	Body and Cover
11-AV	Hardened Chrome Steel-17-4PH (316 stainless steel optional, consult manufacturer)	-	304 Stainless Steel	304-L Sealed Stainless Steel
22-AV	303/304 Stainless Steel (316 stainless steel optional, consult manufacturer)	Stainless Steel	-	304-L Sealed Stainless Steel
13-AV	316 Stainless Steel optional (consult manufacturer)	Stainless Steel	-	304-L Sealed Stainless Steel

Product Advantages

1. Superior Corrosion Resistance: All-stainless steel construction design can withstand both internal and external corrosive environments, suitable for harsh operating conditions.
2. Reliable Sealing Performance: Body and cover feature welded seals with no gasket design, achieving permanent sealing, tamper-proof with low leakage risk.
3. Wide Operating Range: Wide working pressure coverage, adaptable to medium specific gravity as low as 0.50, meeting various industrial application requirements.
4. High-Efficiency Venting Capability: Elliptical float ball combined with high-leverage structure, maximum flow rate up to 115 SCFM, high venting efficiency.
5. Stable and Durable Structure: Lever action is precisely guided, ensuring correct valve seating under all operating conditions, extending service life.

Important Notes

1. Product design, materials, weight, and performance parameters are approximate values and may be changed without notice. Please visit the official website for the latest information.
2. 316 stainless steel valve and seat materials are optional configurations and must be confirmed with the manufacturer in advance.
3. For specific pipe connection sizes and installation requirements, please refer to the corresponding model certification drawings (11-AV: CD #1066; 22-AV, 13-AV: CD #1086).