API 6A Gate Valves

The Orion API Gate Valve is: CAST STEEL, CONDUIT TYPE API 6A GATE VALVES, SINGLE DISC OR EXPANDING GATE, OUTSIDE SCREW AND YOKE, RISING STEM, ELECTROLESS NICKEL PLATED DISC, SOFT SEATS, REMOVABLE YOKE SLEEVE, GLAND REPACKING UNDER PRESSURE

1.HANDWHEEL The spoked handwheel is fabricated from steel pipe. The hub is coupled with the yoke sleeve by means of a tongue

2.GLAND AND FLANGE They are in forged steel and are supplied in two pieces, self-aligning design to permit the gland to descend parallel to the stem even if the eyebolts are unevenly tightened.

3.GLAND BOLTS AND NUTS The forged steel gland bolts are of the eyebolt type, which can be swung outward for ease of gland repacking. They are fixed to the bonnet by hinge pins.

4.BONNET BOLTING Bonnet studs and nuts are manufactured from alloy steel to the relevant ASTM standard.

5.BODY The body is in cast steel and is carefully designed in all its details. The basic dimension, i.e. wall thickness, face to face and flanges comply with the relevant API and ANSI standards. The body-to-bonnet flange is circular, expect in the Class 300 and ring joint on Class 400 and above. Bosses are provided for drain taps.

6.BONNET The bonnet is in cast steel. It is machined to accept yoke sleeve and incorporates a stuffing box dimensioned in accordance with the API standard.

7.BONNET BUSHING The bonnet bushing or backseats is in forged stainless still and forms part of the trim. Special attention is given to its machining.

8.STEM The stem is in forged stainless steel and is part of the trim.  The stem is provided with a T head. A ground backseat is provided to ensure a perfectly tight seal to the stuffing box when the valve is fully open. The stem is ground to minimize friction and prevent damage to gland packing. The threading is trapezoidal ACME type. Dimensions comply with the API 600 standard.

9.SEAT RINGS The rings are in forged stainless and are part of the trim. They are locked for install the springs. Special attention is given to the seating surface, which is ground and lapped, for a perfectly tight seal.

10.SLAB  The slab is part of the trim. It is forged stainless steel for diameters up to 12” and is in cast steel for larger valves. It is connected to the stem by means of a T joint. Special attention is given to the seating surfaces which are ground and lapped..

REMARKS: A lantern ring is furnished only on request; in this case the stuffing box shall be tapped and fitted with an NPS 1/4 plug.

 

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