No. 19 SERIES MGM 1/8" AND 1/4" NEEDLE VALVES are built for service up to 1500 pounds, which is approximately the highest pressure at which the stem can be turned easily inward against the pressure. However, wall thicknesses are sufficient to withstand pressures of many times this amount.
Full flow valves have a large hole through the body for fast flow where close flow control is not needed. Fine flow valves have a small hole through the body for fine flow and close control.
| No. | A | B | C | Diameter of seat opening |
| 19A | 1 23/32 | 1 19/64 | 1 13/16 | .154 |
| 19B | 1 23/32 | 1 19/64 | 1 13/16 | .093 |
| 19C | 2 13/64 | 1 19/64 | 29/32 | .154 |
| 19D | 2 13/64 | 1 19/64 | 29/32 | .093 |
| 19E | 1 23/32 | 1 19/64 | 1 5/8 | .154 |
| 19F | 1 23/32 | 1 19/64 | 1 5/8 | .093 |
| 19G | 2 7/64 | 1 19/64 | 13/16 | .154 |
| 19H | 2 7/64 | 1 19/64 | 13/16 | .093 |
| 19J | 1 53/64 | 1 23/64 | 2 | .154 |
| 19K | 1 53/64 | 1 23/64 | 2 | .093 |
| 19L | 2 7/16 | 1 7/16 | 1 | .154 |
| 19M | 2 7/16 | 1 7/16 | 1 | .093 |
| 19N | 1 23/32 | 1 19/64 | 1 3/4 | .154 |
| 19P | 1 23/32 | 1 19/64 | 1 3/4 | .093 |
| 19Q | 2 11/64 | 1 19/64 | 7/8 | .154 |
| 19R | 2 11/64 | 1 19/64 | 7/8 | .093 |
| 19S | 1 53/64 | 1 23/64 | 2 | .154 |
| 19T | 1 53/64 | 1 23/64 | 2 | .093 |
| 19U | 2 7/16 | 1 7/16 | 1 | .154 |
| 19V | 2 7/16 | 1 7/16 | 1 | .093 |
| 19W | 1 23/32 | 1 19/64 | 1 3/4 | .154 |
| 19X | 1 23/32 | 1 19/64 | 1 3/4 | .093 |
| 19Y | 2 11/64 | 1 19/64 | 7/8 | .154 |
| 19Z | 2 11/64 | 1 19/64 | 7/8 | .093 |
| 19ZA | 1 23/32 | 1 19/64 | 1 13/16 | .154 |
| 19ZB | 1 23/32 | 1 19/64 | 1 13/16 | .093 |
No. 212 SERIES MGM 1/4" NEEDLE VALVES WITH OUTAGE TUBES MADE OF STAINLESS STEEL are identical with No. 19 Series MGM 1/4" Needle Valves having the same model letter designation (A, C, S or U) except that an outage tube (dip tube) has been added. See price sheet for information on outage tube length. These were designed especially for use on No. 211 MGM Sample Cylinders.
These valves are built for service up to 1500 pounds, which is approximately the highest pressure at which the stem can be turned easily inward against the pressure. However, wall thicknesses are sufficient to withstand pressures of many times this amount.
Each valve has a replaceable teflon tip on the end of the stem and replaceable O-ring packing.
The Teflon tip is replaced easily by unscrewing the bonnet from the body, removing the tip by cutting a gash into one side with a knife and pulling it off the stem, slipping a new tip on the stem, replacing the bonnet in the body, (not tightly), and screwing the stem downward to force the tip onto the stem. The bonnet can be removed for inspection before screwing it tightly into the body.
The O-ring packing is replaced easily by unscrewing the bonnet from the body, screwing the stem downward until the O-ring is exposed, removing the old O-ring, slipping a new O-ring into place on the stem, screwing the stem upward as far as it will go and replacing the bonnet snugly into the body. A wrench should be used but the bonnet should not be tightened too tightly into the body as this may bind the stem. A small amount of sealing compound may be placed on the bonnet before screwing it into the body. Do not use sealing compound on the O-ring.
Packing is a synthetic O-ring suitable for the liquid for which the valve is to be used. The packing is located between the fluid chamber and the thread so the thread can be lubricated. The lubrication will not be washed out.
All pipe threads are American Standard. Outlet ends having male threads have tapered seats to fit MGM Universal Fittings.
Do not use a wrench to tighten the stem against the seat.
309 West Hensley Blvd., Bartlesville, Oklahoma 74003
(918) 336-4282 or (800) 628-4282
Fax: (918) 336-8993
Email:
dianne@metalgoodsmfg.com
harley@metalgoodsmfg.com