Relief valves

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Angular shape, spring-loaded. Completely closed oiltight and gastight upper part,
adjustable under operating conditions without medium escaping to the outside.

Type 418 tGFO NBR: seat NBR, o-ring: NBR, temperature: max. 130°C
Type 418 tGFO FKM: seat FKM, o-ring: EPDM, temperature: max. 200°C
Type 418 tGFO PTFE: seat PTFE, o-ring: FKM, temperature: max. 225°C
Ranges of adjustment: 0,2 - 1,2 bar / 1,2 - 3,0 bar / 2,0 - 12,0 bar / 12,0 - 30,0 bar

Straightway form, spring-loaded. Completely closed gastight upper part,

adjustable under operating conditions without medium escaping to the outside, body: 1.4408

Type 430 mGFO EPDM: seat EPDM, temperature: max. 95°C

Type 430 mGFO FKM: seat FKM, temperature: max. 200°C

Ranges of adjustment: 0,5 - 2 bar / 1,5 - 6 bar / 5,5 – 10 bar

With flange connection, body: 1.4408, PN 40, manometer connection G 1/4"

Type 431 mGFO EPDM: seat EPDM, temperature: max. 95°C

Type 431 mGFO FKM: seat FKM, temperature: max. 200°C

Ranges of adjustment: 0,5 - 2 bar / 1,5 - 6 bar / 5,5 – 10 bar, DN 65-80: 1-6 bar

Angular shape, spring-loaded. Completely closed, oiltight and gastight upper part, also suitable

as overflow valve in the event of back pressure. Setting can be sealed.

Type 618 tGFO: Standard with Perbunan gasket. For liquids and gaseous media,

Medium temperature up to 130 °C (optional with PTFE-seal for max. 225°C)

Set pressure: 0,5 - 2,5 bar / 2,0 - 12,0 bar / 12,0 - 20,0 bar

Straightway form, spring-loaded. Completely closed gastight upper part,

adjustable under operating conditions without medium escaping to the outside, body: red brass

Type 630 mGFO EPDM: seat EPDM, temperature: max. 95°C

Type 630 mGFO FKM: seat FKM, temperature: max. 200°C

Ranges of adjustment: 0,5 - 2 bar / 1,5 - 6 bar / 5,5 – 10 bar

With flange connection, body: red brass, PN 40, manometer connection G 1/4"

Type 631 mGFO EPDM: seat EPDM, temperature: max. 95°C

Type 631 mGFO FKM: seat FKM, temperature: max. 200°C

Ranges of adjustment: 0,5 - 2 bar / 1,5 - 6 bar / 5,5 – 10 bar, DN 65-80: 1-6 bar

In straight through form with diaphragm actuator, diaphragm: NBR,

operating mode: the valve opens when the upstream pressure rises

body: 0.7043, PN 16

body: 1.0619, PN 40

in straight through form, spring controlled,

operating mode: the valve opens when the upstream pressure rises

Fig. 12.753: body: GG-25, PN 16

Fig. 22.753: body: GGG-40.3, PN 16

Fig. 32.753: body: 1.0619+N, PN 16

Fig. 52.753: body: 1.4408, PN 16

In straight through form with diaphragm actuator, diaphragm: NBR, max. 100°C or EPDM, max. 110°C,

operating mode: the valve opens when the upstream pressure rises

Fig. 12.705: body: GG-25, PN 16

Fig. 22.705: body: GGG-40.3, PN 16

Fig. 23.705: body: GGG-40.3, PN 25

Fig. 34.705: body: 1.0619+N, PN 25

Fig. 35.705: body: 1.0619+N, PN 40