A 2 inch PVC double flanged fitting with a Viton gasket and Hastelloy encapsulated bolts
Part number 34700659 is Snyder's 2 inch double flanged fitting in PVC, bolted with Hastelloy bolts that are encapsulated, meaning the metal is sheathed in plastic so the liquid never touches it, and sealed with a Viton gasket. A double flanged fitting clamps the tank wall between two flanges drawn together by bolts, which gives an even seal all the way round and suits a thicker or curved wall. The gasket and bolt choice is what sets this one apart: Viton is the gasket for liquids that attack EPDM, and Hastelloy under a plastic sheath is the bolt for liquids that attack stainless steel. At 2 inches it is a common main outlet size for a storage tank. The fitting weighs a pound.
Matching it to a tank and a liquid? Call 866-418-1777 with the tank part number and what will be in it, or add it to your cart above.
What to check before you buy
- The size. 2 inch. Match it to the valve, pipe or hose on the outside, and carry the size into the rest of the order rather than deciding those first.
- The liquid. PVC body, Viton gasket, encapsulated Hastelloy bolts: three wetted materials, all chosen for aggressive liquids. Check your liquid against each, and tell us the concentration and temperature. PVC is the limit on heat here, not the gasket or the bolts.
- The wall. Both flanges need a flat area of wall to bear on so the gasket seals all the way round. Snyder's drawing, linked on this page under Technical Drawing, gives the flange size and the hole the wall needs.
- Access from inside. A double flanged fitting is tightened from both sides, so you need a hand or a tool on the inside flange. On a tank with a small manway, check reach before you drill.
Installing it
Dry-fit first and turn the fitting so the outside connection points where the pipe will run. Draw the bolts up a little at a time in a cross pattern so the gasket is squeezed evenly rather than pinched on one side. Stop when the gasket is seated; a plastic flange cracked by over-tightening is the usual failure, and a nicked bolt sheath exposes the metal you paid to protect. Support the valve and the first length of pipe on their own so the wall carries liquid, not hardware. Fill with water the first time and check the flange for a weep before the real liquid goes in.
Shipping
This is a 2 lb carton, 8 by 8 by 8 inches, and it travels by UPS from Snyder's Lincoln, Nebraska plant when ordered loose. Fittings installed on a tank at the factory ship with the tank from that tank's plant. The listed price is before freight; the freight cost estimator gives the cost to your ZIP. Order it with the tank and both arrive together.
Freight and documents
LTL freight is quoted to your ZIP with the freight cost estimator or by phone at 866-418-1777. The listed price is before freight.
Technical drawing (PDF) for Snyder Industries 34700659.
Ready to order?
Add it to your cart at the top of this page, get LTL freight to your ZIP, request a written quote, or call 866-418-1777. The listed price is before freight.
