RV52–RV111 (Straight-Thru-Flow) direct-acting gas pressure regulators Rp 1/2–Rp 3, inlet up to 20 kPa

Country: Germany · Model: RV52–RV111

Direct-acting spring gas pressure regulators RV52, RV53, RV61, RV81, RV91 and RV111 with Rp 1/2 – Rp 3 connections and inlet pressure up to 20 kPa. These are non-lockup regulators with a conical valve in the Straight-Thru-Flow design patented in 1948. They are fitted on gas appliances and burner systems supplied from low- and medium-pressure networks.

Type: spring regulator without lockup at zero flow (non-lockup), straight-through conical valve
Models: RV52, RV53, RV61, RV81, RV91, RV111
Connections: Rp 1/2 – Rp 3 (ISO 7-1 / EN 10226-1), NPT on request
Max. inlet pressure: RV52: 10 kPa; RV53–RV111: 20 kPa

Request a quote All specifications

Technical specifications

Type	spring regulator without lockup at zero flow (non-lockup), straight-through conical valve
Models	RV52, RV53, RV61, RV81, RV91, RV111
Connections	Rp 1/2 – Rp 3 (ISO 7-1 / EN 10226-1), NPT on request
Max. inlet pressure	RV52: 10 kPa; RV53–RV111: 20 kPa
Body	aluminium; internal parts of steel, aluminium, elastomer
Mounting	RV52/53/61: any position; RV81/91/111: vertical only
Ambient temperature	−15…+80 °C
Standards	Regulation (EU) 2016/426, EN 88-1; gases per EN 437
Options	vent limiters (12A04, 12A39), seals, replacement springs

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

Description

Gas passes through the conical valve straight, without a change in flow direction, so hydraulic resistance is lower and capacity is higher at low inlet pressure. Such flow gives accurate and sensitive regulation at very small pressure differences. Maximum inlet pressure is 10 kPa for RV52 and 20 kPa for RV53, RV61, RV81, RV91 and RV111, with threads per ISO 7-1 / EN 10226-1 (NPT on request). The body is aluminium, internal parts are steel, aluminium and elastomers, and ambient temperature is from −15 to +80 °C. RV52, RV53 and RV61 are mounted in any position, although outlet pressure changes slightly when tilted from vertical, while RV81, RV91 and RV111 are mounted vertically only; an arrow on the lower part of the body shows the flow direction. Automatic vent limiters 12A04 and 12A39 keep gas leakage after a diaphragm rupture within the limits of EN 88, so the breather line need not be piped outside. Design and certification comply with Regulation (EU) 2016/426 and EN 88-1, and gases are defined by EN 437.

How to choose

Choose the model by connection size, inlet pressure and mounting position. RV52 is rated for inlet up to 10 kPa, and RV53–RV111 for 20 kPa; only RV52, RV53 and RV61 can be installed in any position. Sizing is done using the catalog flow charts and the Regulator Sizing program. If lockup through a lever mechanism and inlet up to 100 kPa are needed, look at 325 and 325-L, and for a higher outlet pressure and up to 1416 m³/h the pilot-operated regulator 220.

Request a price and lead time

RV52–RV111 (Straight-Thru-Flow) direct-acting gas pressure regulators Rp 1/2–Rp 3, inlet up to 20 kPa. We reply within one business day.

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

FAQ

What does non-lockup mean in RV regulators?

The regulator does not lock up at zero flow; it is a direct-acting spring model without a shut-off function. Lockup at zero flow is found in the 325 and 210 series.

What is the maximum inlet pressure of RV52 and RV53?

10 kPa for RV52 and 20 kPa for RV53, RV61, RV81, RV91 and RV111.

In which position can RV81 be mounted?

Vertically only. RV52, RV53 and RV61 allow any position with a slight change in outlet pressure.

What ambient temperature is permitted for RV?

From −15 to +80 °C. The body is aluminium, with internal parts of steel, aluminium and elastomers.

What are the vent limiters 12A04 and 12A39 for?

If the diaphragm ruptures they limit gas leakage within EN 88, so the breather line need not be piped outside.