Online payments have been temporarily disabled, please contact customer services if you require assistance

5 Year Warranty
FIG500L_With_Casting_SafetyValve_DN20_Nabic_RedBG_v1.jpg
FIG500L_With_Casting_SafetyValve_DN20_Nabic_RedBG_v1.jpg FIG500L_With_Casting_SafetyValve_DN20_NabicRedBG_v2.jpg FIG500L_With_Casting_SafetyValve_DN20_Nabic_RedBG_v3.jpg FIG500L_With_Casting_SafetyValve_DN20_Nabic_RedBG_v4.jpg

Fig 500L Pressure Relief Valve

5 Year Warranty

The NABIC 500L is designed primarily for use where high tightness is required on the discharge side, having a sealed spring cover to prevent the possibility of back pressure leakage through the top of the valve.

The lift is progressively proportional to flow. All wetted parts are manufactured from dezincification resistance materials. Designed and tested to BS EN ISO 4126 -1. Approved for use on applications requiring WRAS (1 bar and above).

  • High discharge capacity
  • Pressure tight on discharge side
  • Suitable for liquids and inert gases
  • WRAS approved from 4.1 bar to 12.5 bar
Pressure Equipment Directive - PED 2014/68/EU
Product Features +

Medium: Hot water, steam, compressed air, inflammable liquids and inert gasses, Co2 (to 20°C), ethylene glycol, potable water

Size Range: DN15 - DN65

Pressure: 0.4 - 12.5 bar

Material: Gunmetal

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 parallel to BS EN 10226-1. NPT connections are available upon request.

Testing

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

  • Available with Viton seat design
  • Pressure setting locked and sealed
  • Drain plug fitted on DN32 and above allows fitting of a pressure gauge

Materials

Ref No Name of Part Material
1 Leak Proof Dome Bronze, BS EN 1982 CC491K
2 Locknut Brass, BS EN 12164 CW609N
3 Dome 'O' Ring Viton
4 Spring Chrome Vandium Alloy Steel, BS 2803 735 A50 HS (Stainless Steel, BS 2056 302S26 Opt)
5 Label Yellow kapton
6 Spring Cover Bronze, BS EN 1982 CC491K
7 Piston Brass, BS EN 12164 CW609N
8 Cover Seal Viton
9 Seat Seal Holder Bronze, BS EN 1982 CC491K / Brass BS EN 12164 CW602N (DZR)
10 Seat Seal PTFE (Viton Opt)
11 Starlock Washer Stainless Steel
12 Body Bronze, BS EN 1982 CC491K
13 Adjusting Screw Brass, BS EN 12164 CW609N
14 Spring Plate Brass, BS EN 12164 CW609N
15 Spindle Brass, BS EN 12164 CW721R
16 Seat Seal Retaining Plate Bronze, BS EN 1982 CC491K / Brass BS EN 12164 CW602N (DZR)
17 O-Ring Viton

Dimensional Drawings

m,

Dimensions & Weights

SIZE
DN
Rp BSP
Inlet
Rp BSP
Outlet
A
(mm)
B
(mm)
C
(mm)
Weight
(Kg)
15 1/2" 3/4" 33 20 123 0.70
20 3/4" 1" 39 24 136 0.93
25 1" 1 1/4" 45 30 155 1.42
32 1 1/4" 1 1/2" 54 36 201 2.50
40 1 1/2" 2" 64 41 236 4.63
50 2" 2 1/2" 76 47 267 7.00
65 2 1/2" 3" 90 60 330 12.50

 

Downloads +
Discharge Capabilities +

Sign up to get the latest product news and offers direct from NABIC