Volume Six - Pre-Victorian to the Present Day - Select Aspects - Hydraulic Accumulators . . .

The upper end to be fitted with a stuffing box for hemp packing, with suitable gland secured by steel studs of ample strength, and fitted with gunmetal gland and neck bushes.

The ram to be of hard cast iron crosshead and guide, to which the suspending bolts for holding the weight case will be attached. Each end of the crosshead to have guide shoes, to work on the rails bolted to guide framing. The ram to be provided with bayonet collar on the lower end to prevent over running.

The weight case to be of wrought steel, and of sufficient capacity to hold scrap iron ballast, to give a pressure of 750 lbs per sq. inch.

The weight case to have an inner tube to encircle the cylinder, and to be connected to crosshead by suspending bolts riveted to the inner tube, and strong gusset plates to stiffen the bottom and connect it with the outer casing.

Cylinder to be fitted with air valve and frost plug to drain out, and with 4" diam inlet to suit the T.V.Rly standard flange, fitted with stop valve. A suitable release valve to open automatically when the accumulator reaches the top of its stroke to be also included.

The accumulator to be complete with pitch pine upright side frames strongly braced and bolted,to which is attached the mild steel rails, . . . etc.

Then followed the Taff Vale Railway Specification and General Conditions. [142] Clause 2 stated "The Accumulator and all other accessories are to be constructed, delivered carriage free, and erected complete at the site at Penarth Dock in strict accordance with the Specification and Drawings. . . The work is to be then carried out in every detail to such Drawings and Specification, and for the gross price named in the tender, it being understood that no extras will be paid for beyond this sum."