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3/2-Way Plastic Pneumatic Piston Operated Mixing or Diverting Valves
For On-Off Application (Rust Free Design)

DATA SHEET
6816M-Normally
‘A’ Port Closed.
6819M-Normally
‘B’ Port Closed.

SPECIFICATIONS :
Sizes	15 mm (½”) to 50 mm (2”).

CONSTRUCTION :
Body and Bonnet	Investment casted ASTM A351 CF8(St.St.304)CF8M(St.St.316)
Pressure Temp. rating.	As per ANSI class 300.
End Connections	Standard BSP(F) Optional-NPT(F)
Seating	Soft seated Teflon backed by EPDM. Optional-VITON/EPDM, Buna Nitrile.
Leakage Class	As per ANSI B 16.104-1976, Teflon seating class IV. For other soft seating class VI Drop Tight/Bubble Tight.
Trim	SS AISI 304/316
Stem Packing	Self adjusting, Spring loaded Teflon packing.
Characteristics	On-Off, normally closed / normally open
Working Fluid Pressure	Refer to table below.
Working Temperature	On steam- continuous :155°C, Intermittent 180°C, with Teflon seating, Buna Nitrile 80°C, EPDM 135°C VITON 180°C

ACTUATOR
Spring Return type Plastic Pneumatic Actuator.
Cylinder, cover,Body & piston	Glass filled polyamide.
Piston Packing	Buna Nitrile.
Actuator Spring	IS 4454 Grade III, duly painted.
Actuator Working Single pressure	3.5 to 6 bar (refer to graph)
Operating cycles per hour	15mm,20 mm,25 mm upto 600 cy/hr.,35 mm and 50mm upto 300 cy/hr.(tested on air,on other fluids this figure may vary).

Life expectancy	Over one million cycles (lab tested in ideal condition.)
Air Quality	Lubricated/Non-lubricated.
Max. Operating Pressure differential.	Refer to graph.
Accessories	Air lock, position indicating limit switch box, solenoid valve, filter regulator gauge. Other accessories available on application.
Application	For control of air, water, oil, gas, steam in textile, power generation, atomic energy, paper & pulp, chemical, petrochemical industries, PSA nitrogen system, air dryer, gas generator and in process plants.
Back Pressure	Generally all models are for back pressure upto 2.5 bar. However for specific application where higher back pressure is excepted, refer to ‘AVCON’.

SPECIFICATION TABLE

Catalogue Number	Size		Orifice	Flow Factor Kv	Maximum Pressure in bar		Actuator Model	Air Consumption
	Size		Orifice	Flow Factor Kv	Water	Steam	Actuator Model	Air Consumption
	Inch	mm	mm	M³ /hr.	Bar	Bar	No.	liters/cy.
6816M15 6819M15	½	15	15	3.3	10 10	10 10	K-61	0.25
6816M20 6819M20	3/4	20	18	4.7	10 10	10 10	K-61	0.25
6816M25 6819M25	1	25	23	8.5	10 10	10 10	K-81	0.64
6816M35 6819M35	1 ½	35	36	22.5	7 7	7 7	K-101	0.85
6816M50 6819M50	2	40	45	35	6 7	6 7	K-101	0.85

Note:
6816MXX is Mixing Valve with ‘A’ Port Closed, Flow ‘B’ to ‘AB’ and
6819MXX is Diverting Valve with ‘B’ Port Closed, Flow ‘AB’ to ‘A’.

OPERATION :

Valve Type 6816M- In normal condition, ‘A’ port is closed and ‘AB’ port is connected to ‘B ‘ or ‘B’ port is connected to ‘AB’ port. On receiving
pilot pressure, ‘A’ port is connected to ‘AB’ or ‘AB’ port is connected to ‘A’ closing port B. Valve Type 6819M - Normally ‘B’ port is closed and ’A’ port is connected to ‘AB’ or ‘AB’ port is connected to ‘A’. On receiving signal ‘A’ port is closed and ‘B’port is connected to ‘AB’ or ‘AB’ port connected to ‘B’.

Mixing
Valves can be used for introducing two different fluids (mixing) through two different ports to common port ‘AB’.

Diverting
One fluid coming through port ‘AB’ can be diverted to ‘A’ port or ‘B’ port.

DIMENSIONS (IN MM)

Catalogue Number	Size		Actuator	A	B	C	D	E
Catalogue Number	Inch	mm	Actuator	A	B	C	D	E
6816M151 6819M151	½	15	K-61 K-51	85	52	205 192	80 63.5	52 44
6816M201 6819M201	3/4	20	K-61 K-61	110	66	210 210	80	52
6816M251 6819M251	1	25	K-81 K-61	120	72	250 218	100 80	60.5 52
6816M351 6819M351	1 ½	35	K-101 K-81	150	92	325 265	129 100	73 60.5
6816M501 6819M501	2	50	K-101 K-101	190	100	330 330	129	73

Note:

Technical specifications details & dimensions are subject to change without prior notice.
Dimensions in the table are approximate subject to final confirmation by AVCON.

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