325 and 325-L lever-type gas pressure regulators and line regulators with overpressure protection, inlet up to 100 kPa

Country: Germany · Model: 325 / 325-L

Lever-type gas pressure regulators 325-3, 325-5 and 325-7 and line regulators 325-L for domestic, commercial and industrial appliances, inlet pressure up to 100 kPa. The lever linkage of the valve gives lockup at zero flow (dead-end lockup) and accurate regulation from full burner flow to pilot flow. The 325-L series reduces increased pressure in internal gas systems ahead of appliances that have their own regulator.

325 (EU): 325-3, 325-5, 325-7; Rp 3/8 – Rp 1 1/2; inlet up to 100 kPa; aluminium body
325-L 2 psi: 325-3L … 325-11L; 3/8"–3"; CSA inlet 2 psi (13.8 kPa), tested to 10 psi (69 kPa); outlet 1.7–2.7 kPa
325-L 5 psi: with overpressure protection devices (OPD); 3/8"–2"; CSA inlet 5 psi (34.5 kPa), tested to 10 psi
Function: lockup at zero flow (dead-end lockup), regulation from full to pilot flow

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Technical specifications

325 (EU)	325-3, 325-5, 325-7; Rp 3/8 – Rp 1 1/2; inlet up to 100 kPa; aluminium body
325-L 2 psi	325-3L … 325-11L; 3/8"–3"; CSA inlet 2 psi (13.8 kPa), tested to 10 psi (69 kPa); outlet 1.7–2.7 kPa
325-L 5 psi	with overpressure protection devices (OPD); 3/8"–2"; CSA inlet 5 psi (34.5 kPa), tested to 10 psi
Function	lockup at zero flow (dead-end lockup), regulation from full to pilot flow
Ambient temperature	−15…+80 °C (EU)
Standards	Regulation (EU) 2016/426, EN 88-1; ANSI Z21.80/CSA 6.22 (325-L)
Options	vent limiters 12A09/12A39/12A49, 1/8" NPT pressure taps

Specifications are taken from the manufacturer’s technical documentation. Updated 11/06/2026.

Description

The European range covers 325-3, 325-5 and 325-7 with Rp 3/8 – Rp 1 1/2 connections per ISO 7-1 / EN 10226-1 (NPT on request), an aluminium body and internal parts of steel, aluminium, brass and elastomers. Mounting is in any position, but with a ball vent limiter only vertical; ambient temperature is from −15 to +80 °C, certification is per Regulation (EU) 2016/426 and EN 88-1, and gases per EN 437. The 325-L version for 2 psi systems (325-3L, 325-5L, 325-7AL, 325-9L, 325-11L, connections 3/8–3 inches) is CSA certified for inlet of 2 psi (13.8 kPa) and tested to 10 psi (69 kPa), with an emergency inlet pressure of 65 psi (450 kPa). Versions for 5 psi systems (3/8–2 inches) are supplied with overpressure protection devices (OPD); they are certified for inlet of 5 psi (34.5 kPa), and capacity tables are published for inlet pressure of 0.5–5 psi. The line regulators comply with ANSI Z21.80/CSA 6.22.

How to choose

For low-pressure appliances that need accurate lockup take 325 with inlet pressure up to 100 kPa, and for internal systems with increased pressure 325-L in the 2 psi or 5 psi version with OPD. If you need a non-lockup regulator with high capacity, look at RV52–RV111, and for strongly varying inlet pressure R/RS or 210 with inlet up to 85 kPa.

Request a price and lead time

325 and 325-L lever-type gas pressure regulators and line regulators with overpressure protection, inlet up to 100 kPa. We reply within one business day.

Or email office@usk.ua or call +38 (044) 339-50-20.

FAQ

What is dead-end lockup in 325 regulators?

It is stable lockup at zero flow thanks to the high ratio of the valve's lever linkage. The regulator maintains pressure from full burner flow to pilot flow.

What inlet pressure does 325-L in the 2 psi version allow?

CSA certification for 2 psi (13.8 kPa), testing to 10 psi (69 kPa). The maximum emergency inlet pressure is 65 psi (450 kPa).

What outlet pressure does the 325-L spring give?

The certified spring gives an outlet pressure of 7–11 inches of water column, that is 1.7–2.7 kPa.

Is OPD needed in the 5 psi version?

Yes, such regulators are supplied complete with overpressure protection devices, with CSA certification for inlet of 5 psi (34.5 kPa).

In which position is the 325 regulator mounted?

In any position, and if a ball vent limiter is fitted, only vertically.