Worcester 13 / 14 Series User Instruction – WCENIM0002-01
Page 7 of 13
6 Operation
The product/system must not be operated beyond the parameters specified for the
application. If there is any doubt as to the suitability of the product/system for the application
intended, contact Flowserve for advice, quoting the serial number.
6.1 Use
Worcester valves provide bubble-tight shut off when used in accordance with
Worcester published pressure / temperature charts.
Metal seats fitted downstream provide shut off to FCI 70-2 1998, Class VI.
It is not good practice to leave a soft-seated ball valve in the partially open position
as this will damage the seats and reduce valve life. Flow control ball valves, which
contain seats for this purpose, are available from Flowserve Flow Control.
Media which may solidify, crystallise, or polymerise, should not be allowed to stand in
the ball cavity, as this is detrimental to valve performance and life.
6.2 Manual operation
a) The basic type of wrench on DN 15 – 50 (NPS ½ - 2) valves is made of sheet steel
with an integral stop. Larger sizes of valves have a cast wrench head and a
tubular handle secured to the stem by a wrench bolt.
b) 13 series: This 3-port valve provides flow from either of the two opposing
ports to a common outlet. Media is switched from one inlet port to the
other by quarter turn operation.
c) 14 series: This is the same as the 13 series but uses a half turn operation. The
mid position allowed for full isolation.
d) When operating the valve, avoid excessive loads on the wrench.
6.3 Remote operation
a) Where automation of valves is required, Flowserve Flow Control can supply
pneumatic and electric actuators to cover a wide range of operating torques.
b) Operation will be in accordance with installation, operation, and maintenance
instructions for the relevant actuator.
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