Quick coupling

ISO.A SERIES

PULL BREAK
HYDRAULIC COUPLINGS

1/4" - 2" Poppet Valve Types to ISO 7241 Series A

INTRODUCTION
 ISO.A Series couplings are the ideal choice
where a tough, durable product of superior quality is
required. They are perfectly suited to industrial and
agricultural applications. A poppet valve is used to
minimise the pressure drop characteristics and provid
a positive sealing arrangement.

COMPARISONS
In comparison to ISO.B couplings the ISO.A Series are
1. Smaller.
2. Easier to connect and release.

FEATURES 
* Positive, quick connection ensured by the snap
together locking ball system.
* When connected the male and female halves can rotate, even under pressure, thus avoiding any torsional stress in the flexible hoses.
* Designed to withstand high pressure peaks and pulses.
* Poppet valves have balanced springs and calibrate oil flow passages to minimise the pressure drop.
* Poppet valve seals have shockproof protective edges.

CONSTRUCTION
Zinc plated, heat treated carbon steel. Nitrile 'O' ring seals are fitted as standard. VITON seals are available on request.

FIRG SERIES

PREMIER RANGE

INTRODUCTION
 FIRG Series couplings were first introduced in 1982. Their early success was due to good performance, long life and competitive prices. As a result of their ongoing development programme, the couplings have over the years maintained a superb track record.
 In 1992 a major upgrade was introduced and the name Premier Range added to reflect the dominant position of the FIRG Series couplings in the market. In terms of flow rate and pressure drop characteristics, the FIRG Series has now been eclipsed by the A Series Premier Plus Range. However, for many applications the FIRG Series still offers the optimum balance between price and performance. The ISO/DIS 16028 Standard is based on the FIRG Series, since it s the most widely used type of flat face coupling with a proven track record. For connection under pressure please refer to either the APM Series of Quick Release Male Couplings on page 14 or the VP and VEP Series Screwed Couplings on pages 10 and 12 respectively.

APPLICATIONS
Where clean connections are required despite dusty or dirty conditions. The anti-brinelling features enable them to operate successfully in the applications involving high pressure pulses.

User industries include: agriculture, construction plant, mobile equipment, general industrial, nuclear and mining.

OPERATION
To couple, wipe the mating faces clean and push the two halves together until they click shut. Twist the sleeve and the coupling is locked. To release, align the notched sleeve with the ball, pull back the sleeve and the coupling springs apart.

ANTI-BRINELLING FEATURES
* 12 ball locking mechanism in the 1/4", 3/8", 1/2",1/2"A, 1 and
   1 1/4" couplings.
* 15 ball locking mechanism in 3/4" and 3/4" B couplings.
* 18 and 20 balls in the 1 1/2" and 2" couplings respectively.
* Close tolerance male and female mating diameters to ensure equal ball loading.

ADVANTAGES
* Flat mating faces are easily wiped clean to prevent the
   ingress of contaminants.
* Streamlined internal flow path minimises the pressure drop.
* Non-spill design avoids fluid loss during connection and
   disconnection.
* No air intrusion during connection.
* Locking sleeve prevents accidental disconnection.
* Bi-directional flow.
* Sizes 3/8" and 1/2" comply with HTMA interface requirements
   and are recommended by the BHTMA for use in equipment
   manufactured by its members.
* Conforms to current ISO 16028 Standard.

PREMIER FEATURES
* Robust construction. High working and burst pressure ratings.
   Excellent fatigue life.
* Female coupling seal swaged-in to prevent extrusion under
   pressure.
* Dynamic seal geometry in male couplings allows bi-directional
   flow.

HPA SERIES

HIGH PRESSURE,
BALL SEAL,
SCREWED COUPLINGS

INTRODUCTION
High Pressure Ball Seal Screwed Couplings can be connected and disconnected even with a low residual hydraulic pressure in the line. The screw connection mechanism eliminates Brinelling (indentation of the locking balls into the retaining groove) and thus makes the couplings suitable for high pressures and pressure pulse applications. Two sizes are offered, 1/4" and 3/8" NPT.

FEATURES
* Connection and disconnection can be performed even with
   low residual hydraulic pressure in the line.
* Screw thread retaining mechanism eliminates Brinelling

APPLICATIONS
General industrial equipment

MATERIALS
Zinc plated carbon steel body material with nitrile seals and PTFE backing ring. Other seal materials available on request.

TECHNICAL DETAILS
Maximum working pressure for both sizes of couplings is 700 bar. Working temperature range with nitrile seals is -20°C to +100°C