Brand: Hattersley

Hattersley Fig. 907 Bronze Y-Type Strainer PN25

Name: Hattersley Fig. 907 Bronze Y-Type Strainer PN25 | Seven Star
Brand: Hattersley
SKU: Fig. 907

Description

Y-type bronze strainer with pressure-drop test points

The Hattersley Fig. 907 is a bronze Y-type strainer rated PN25. Its job is to remove foreign matter from piping systems before it reaches pumps, control valves, meters and heat exchangers. A perforated stainless steel screen with 0.75 mm diameter holes catches the debris, and the data sheet states that the design gives low flow resistance. The strainer is WRAS approved for use on hot and cold water systems up to 85 C, according to the maker.

A feature that sets the 907 apart is that it is supplied with two Fig. 631 test points, fitted to the body, so that the pressure drop across the strainer can be measured in service. A rising pressure drop is the standard indicator that the screen needs cleaning.

Key features

Perforated stainless steel (type 304) screen, 0.75 mm holes
WRAS approved for hot and cold water systems up to 85 C
Two Fig. 631 test points to measure pressure drop
Bronze body and cap, BS EN 1982 CC491K
Taper threaded to BS EN 10226-2 (UK) or ANSI B1.20.1 (US)
Not suitable for group 1 or group 2 gases or unstable fluids (PED 2014/68/EU)

Technical specification

Parameter	Specification
Valve type	Y-type strainer, screwed ends
Pressure rating	PN25
Pressure / temperature	25 bar from -10 to 100 C; 23.4 bar at 110 C; 21.8 bar at 120 C
Screen	Stainless steel type 304, perforated, 0.75 mm holes
Body and cap	Bronze, BS EN 1982 CC491K
Gasket	Klingersil C4430
Test points	Fig. 631, DZR brass, BS EN 12165 CW602N (two supplied)
ID plate	Anodised aluminium
End connection, UK	Taper threaded to BS EN 10226-2
End connection, US	ANSI B1.20.1
Approval printed	WRAS approved, hot and cold water, up to 85 C
Fluid limits	Not for group 1 gases, group 2 gases or unstable fluids

Dimensions and weights

Size (in)	1/2	3/4	1	1 1/4	1 1/2	2
A mm	71	86	101	134	148	176
B mm	29	35	45	54	63	77
C mm	42	51	55	80	87	97
D mm	49	60	67	93	103	119
E mm	100	114	127	157	171	194
F mm	27	35	42	50	58	71
G mm	35	44	54	63	73	93
H mm (withdraw)	144	176	202	294	322	367
Weight kg	0.27	0.44	0.78	1.30	1.81	3.10

Dimension H is the withdraw distance, the clearance needed to remove the screen, so leave at least that much space below the cap when planning pipe routes.

Selection and ordering guide

Select by line size. A strainer is normally the same size as the line; reducing the size raises velocity and pressure drop. The 0.75 mm perforation is fine, so it is suited to protecting small control valves and heat-exchanger plates, but fine screens clog sooner on dirty systems, which makes the supplied test points useful. Hattersley lists a separate bronze Y-type strainer, Fig. 807, with a PN32 rating, for higher pressure duty. Note the pressure rating of 25 bar at up to 100 C, falling to 21.8 bar at 120 C.

Installation and maintenance

General practice: fit the strainer with flow in the direction of the arrow on the body and the cap pointing downwards or at an angle so that the screen can be withdrawn. Leave the withdrawal clearance H. Connect a differential pressure gauge to the two test points to read pressure drop, and clean the screen when the reading rises above the value set at commissioning; the sheet does not state a cleaning limit. Shut off and relieve pressure before opening the cap.

Applications

Strainers are standard protection ahead of pumps, balancing valves and meters in chilled water, heating and domestic hot water systems. In Gulf building services they are installed on pump suctions in district cooling and plant rooms where scale and construction debris collect after commissioning.

Understanding the strainer ratings and fluid limits

The data sheet gives a temperature-dependent rating table: 25 bar from -10 to 100 C, 23.4 bar at 110 C and 21.8 bar at 120 C. The WRAS approval is stated separately and only for hot and cold water up to 85 C, so a system at 110 C may use the pressure rating but not the water-fittings approval. The sheet also warns that the strainer is not suitable for group 1 gases, group 2 gases or unstable fluids under the Pressure Equipment Directive, which limits it to liquids of the appropriate group.

The materials are specified by European standard: bronze to BS EN 1982 CC491K, stainless steel strainer mesh type 304 and a Klingersil C4430 gasket on the cap. These are the names to quote when a project material approval list is checked.

Specification checklist before ordering

Confirm the size and thread (BS EN 10226-2 for the UK pattern or ANSI B1.20.1 for the US pattern), the working pressure of 25 bar from -10 to 100 C, the fluid and the screen opening. The sheet states that the strainer is not suitable for group 1 or group 2 gases or unstable fluids, so confirm the medium. The 0.75 mm perforated screen suits general water duty; finer screens must be checked with the manufacturer.

Using the test points

The two Fig. 631 test points allow a differential pressure gauge to be connected across the strainer. Record the clean pressure drop at commissioning, and clean the screen when the reading rises noticeably. Fit isolation valves each side so that the cap can be removed without draining the system.

Information needed for a quotation

Send the figure number, size, thread, quantity, delivery location in Oman or the GCC and the medium and temperature.

Related products

See Fig. 5N and Fig. 13 for downstream control, the Fig. 1013 check valve and the Globe Valves category.

Frequently asked questions

What is the screen perforation?

0.75 mm diameter holes in a stainless steel screen.

What approval does the sheet print?

WRAS approved for hot and cold water systems up to 85 C.

What are the test points for?

Two Fig. 631 test points are supplied to measure pressure drop across the strainer.

What is the rating?

PN25: 25 bar from -10 to 100 C, 23.4 bar at 110 C, 21.8 bar at 120 C.

Can it be used with gas?

No. The sheet says it is not suitable for group 1 or group 2 gases or unstable fluids.

Documents and quotation

Download the official data sheet from this page. Size and thread form (BS or NPT) are the details we need for a quotation. Seven Star LLC is an independent supplier in Muscat.

Datasheets & Documents

Datasheet Hattersley Fig. 907 Datasheet (manufacturer PDF, DS-1219 P124) Download

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About brand

Hattersley is a British valve brand whose origins date back to 1897, when 20-year-old Richard Hattersley started a small tool-making business in Halifax. The business later moved to Ormskirk, became a public company in 1936 and merged with Peglers in 1968 to form Pegler-Hattersley. In 2004 Crane Limited bought the Hattersley valve business, and the brand is now part of Crane Building Services & Utilities.

Seven Star LLC is an independent supplier in Muscat. We list Hattersley valves by figure number for building services and utility pipework in Oman and the GCC.

Hattersley company profile

Founded	1897, Halifax, England, by Richard Hattersley
Later base	Ormskirk, Lancashire
Ownership	Crane, since 2004
Previous owner	Hattersley Newman Hender Limited, a Tomkins plc subsidiary
Product families	Bronze gate, globe and check valves, cast iron gate valves, lugged and wafer butterfly valves, Y-type strainers, needle valves, balancing and flow measurement valves

Milestones

1897: Richard Hattersley starts his business in Halifax.
1936: Hattersley becomes a public company.
1968: Hattersley merges with Peglers.
2004: Crane acquires the Hattersley valve business.

Hattersley product series

Bronze valves include the Fig. 13 globe valve and the Fig. 5N and 5NLS needle globe valves, the Fig. C31 gate valve, the Fig. 116 and 116EXT full bore ball valves, the Fig. 1013 horizontal lift check valve and the Fig. 907 Y-type strainer.

Larger valves include the Fig. M511 cast iron flanged gate valve, the Fig. 950 semi-lugged and Fig. 980 ANSI fully lugged butterfly valves and the Fig. 861 non-slam check valve. Hattersley tests every valve to its product standard, and many valves carry WRAS approval.

Where Hattersley valves are used

Heating, chilled water, domestic water and fire water pipework in commercial and public buildings, plant rooms and utility networks.

Hattersley products we list

Family	Examples
Globe Valves	Fig. 1013 Bronze Horizontal Lift Check V…, Fig. 5N and 5NLS Bronze Needle Globe Valve, Fig. 907 Bronze Y-Type Strainer PN25, Fig. 950 Semi-Lugged Wafer Butterfly Val…, Fig. 980 ANSI Fully Lugged Butterfly Val…, Fig. C31 Bronze Gate Valve PN16 Series B, Fig. M511 Cast Iron Flanged Gate Valve P…

Ordering Hattersley valves: what we need

Send the figure number, size, end connection (screwed, flanged or lugged) and pressure rating, together with the medium and any approval required. Data sheets for each figure print ratings, materials, dimensions and test pressures.

Facts checked against Hattersley's own pedigree and history page and Grace's Guide, October 2026.

Browse Hattersley products by category: Globe Valves.