Types 14460 and 14470 integrated check/thermal relief valves



HOME


PUMPS, MOTOR PUMP UNITS

Water/Glycol pumps

Water pumps

Oil pumps


PRESSURE INTENSIFIERS

Topside use

Subsea applications


VALVES

Relief valves

Thermal relief

Directional valves

Slide valves

Shutdown, lockout relay,

excess flow, flowline pilot


GENERAL

About us

Quality

Contact




THERMAL RELIEF VALVES

Types 14460 & 14470

Type 14480

Single unit for both check valve and thermal relief functions – eliminates inter-valve piping.
Exhaust line piping is totally eliminated.
Removal or disconnection of the valve during proof testing is not required.
Pressure ranges up to 700 bar.
External parts 316 s/s, hardened parts 431 s/s

The Type 14460 and 14470 check/thermal relief valves have been developed to directly replace with a single unit separate check and thermal relief valves used in wellhead control systems. The 14470 is conventionally connected (see table below) while the 14460 is manifold mounted.

The principal feature of this valve is its ability to return exhausted fluid caused by thermal expansion downstream internally through the valve itself back to the supply point – thereby eliminating separate exhaust piping.


Pressure differential between B and C (see above) caused by thermal expansion downstream of B is exhausted through the relief valve back into the supply at point C. The design of the relief valve is such that variations in pressure at point C caused by the operation of adjacent


 

valves or by leakage have no effect on the setting of the relief valve. Even in the event of the supply pressure falling to zero, the integrity of the relief valve will be retained.


Materials

External/wetted parts – 316 stainless steel
Check valve seat – Acetal
Hardened parts – 431 stainless steel


Drawing

Part No. Pressure
range
(bar)
Connections Dim A
(mm)
Cv Proof test pressure
(bar)
Cracking pressure
(bar)
Max flow
(gals/min)
14460–01 35 – 345 Manifold 132 0.56 1,000 0.3 2
14460–02 345 – 700 Manifold 132 0.56 1,000 0.3 2
14470–01 35 – 345 1/4"NPT 132 0.56 1,000 0.3 2
14470–02 345 – 700 1/4"NPT 132 0.56 1,000 0.3 2
14470–03 35 – 345 3/8"NPT 132 0.56 1,000 0.3 2
14470–04 345 – 700 3/8"NPT 132 0.56 1,000 0.3 2
14470–07 35 – 345 1/2"NPT 139 1.60    400 0.4 6
14470–08 345 – 700 1/2"NPT 132 0.56 1,000 0.3 2
14470–10 345 – 700 9/16"MP Butech 139 1.60    400 0.4 6

Test procedure

Each valve is tested by Marshalsea Hydraulics and issued with a unique serial number prior to dispatch. The following describes the testing procedure.

 

1

Ensure compliance with internal procedure – safe system of work for manual test rigs.

2

Visually examine for external defects, damaged threads, etc.

3

Connect to the test rig as shown.

4

Unscrew adjuster to minimum setting.

5

Raise pressure until valve functions – note performance of reseat. Repeat in increments of 2,000 PSI to the valve's upper limit. Reseat must remain within 5% of cracking pressure at all times. Valves that fail to reseat within 5% are to be reworked.

6

Hold on pressure for approximately 2 minutes. Check for pressure decay and leakage.

7

Remove from test rig and immediately plug both ports.

8

Ensure that Test Certificate log is completed and mark valve with the information contained on the production documentation. Affix CE mark.

9

Pass to inspection.


© Marshalsea Hydraulics Limited – a member of the Bifold Fluidpower group of companies.

Website by Big Bird Design