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5 Year Warranty
FIG500FN_SafetyValve_DN25_Nabic_RedBG_v1.jpg FIG500FN_SafetyValve_DN25_Nabic_RedBG_v2.jpg FIG500FN_SafetyValve_DN25_Nabic_RedBG_v4.jpg FIG500FN_SafetyValve_DN25_Nabic_RedBGx_v3.jpg

Fig 500FN Pressure Relief Valve

5 Year Warranty

The NABIC 500FN safety valve is 316 Stainless Steel construction, designed and tested to BS EN ISO 4126 -1, fitted with resilient PTFE to metal seating design.

To improve flow, the internal surface finish of the body is of a high level by utilising the latest casting techniques.

  • High discharge capacity.
  • Pressure tight on discharge side
  • Corrosion resistant and suitable for difficult liquids or gases
Pressure Equipment Directive - PED 2014/68/EU
Product Features +

Medium: Acids & gases. Please check with Technical Department.

Size Range: DN15 - DN25

Pressure: 0.4 - 11 bar

Material: Stainless Steel

Temperature: -20 to 195°C

Connection: Screwed inlet & outlet

Pipe Connections

Screwed female inlet and outlet connections. outlet connection is one size larger than inlet connection. Threaded connections are Rp (BSP) parallel to BS EN 10226-1.


All valves are shell and seat tested (to confirm set pressure) before leaving the factory and all valves are supplied pre-set with a tamper proof seal. Pressure Test Certificate and Letters of Conformity available on request.

Product Extras

  • Pressure setting locked and sealed


Ref No Name of Part Material
1 Leak Proof Dome Stainless Steel, BS 970 316S11
2 Locknut Stainless Steel, BS 970 316S11
3 Dome 'O' Ring Viton
4 Spring Stainless Steel, BS 2056 302S26
5 Label Yellow kapton
6 Spring Cover Stainless Steel, BS 3146 ANC 4BFC
7 Piston Stainless Steel, BS 970 316S11
8 Cover Seal Viton
9 Seat Seal Holder Stainless Steel, BS 970 316S11
10 Seat Seal PTFE (Viton Opt)
11 Starlock Washer Stainless Steel
12 Body Stainless Steel, BS 3146 ANC 4BFC
13 Adjusting Screw Stainless Steel, BS 970 316S11
14 Spring Plate Stainless Steel, BS 970 316S12
15 Spindle Stainless Steel, BS 970 316S13
16 Seat Seal Retaining Plate Stainless Steel, BS 970 316S14
17 O-Ring Viton


Dimensional Drawing

Dimensions & Weights

15 1/2" 3/4" 33 24 119
20 3/4" 1" 45 60 132
25 1" 1 1/4" 54 64 157


Downloads +
Discharge Capabilities +

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