DP27, DP27E, DP27G, DP27GY, DP27R & DP27Y

Pilot Operated Pressure Reducing Valves with SG Iron Bodies

Description

DP27, DP27E, DP27G, DP27GY, DP27R and DP27Y pilot operated pressure reducing valves have bodies manufactured using SG iron.
These products are not suitable for oxygen service.

Available types
	DP27	Suitable for steam or compressed air applications.
	DP27E	Suitable for steam applications. It incorporates an electrical solenoid valve in the pipe assembly allowing remote closure by means of a switching or timer device.
	DP27G	Suitable for compressed air and inert industrial gas applications. Its design incorporates a nitrile soft seal pilot and main valve. Note: it is not available with a solenoid valve.
	DP27GY	Suitable for compressed air, inert industrial gas and critical low pressure control applications. Its design incorporates a nitrile soft seal pilot and main valve, and uses a lower rate control spring with a downstream pressure range of 0.2 – 3.0 bar. Note: it is not available with a solenoid valve.
	DP27R	This can be remotely adjusted by varying a pressure signal to the pilot diaphragm. This is usually achieved using a Spirax-Monnier pressure regulator and an instrument air supply.
DP27Y	Suitable for steriliser or critical low pressure control applications. It uses a lower rate control spring with a downstream pressure range of 0.2 – 3.0 bar.

Standards
This product fully complies with the requirements of the EU Pressure Equipment Directive/UK Pressure Equipment (Safety) Regulations and carries the mark when so required.

Certification
This product is available with a manufacturer’s Typical Test Report.
Note: All certification/inspection requirements must be stated at the time of order placement.

Sizes and pipe connections

DP27, DP27E, DP27G, DP27GY, DP27R & DP27Y Pilot Operated Pressure Reducing Valves with SG Iron Bodies

DN15LC
– Low Capacity version (not available for DP27G or DP27GY) DN15, DN20, DN25, DN32, DN40 and DN50

Screwed
BSP (BS 21 parallel) or NPT (DN15 to DN25 only)

Standard flanges:
DN15 – DN50 EN 1092 PN16 and PN25
DN25 – DN50 BS 10 Table H and ASME 300

Flanges available on request:
DN15
– DN15 to DN40 JIS 10/16
– DN50 JIS10 and JIS16
– DN15 to 50 ASME 150

DN15
– DN20 BS 10 Table F

DN15
– ASME 300

Materials

No.	Part		Material
1	Adjustment screw		Steel	BS 3692 Gr. 8.8
2	Adjustment lock-nut		Steel	BS 3692 Gr. 8
3	Spring housing		SG iron	DIN1693 GGG 40.3
4	Top spring plate		Stainless steel	ASTM A351/A351M CF8M
5	Pressure adjustment spring		Stainless steel	BS EN 10270-3:2001 302 S 26
6	Bottom spring plate		Hot brass stamping	BS EN 12165 CW617N
7	Spring housing	Securing nuts	Steel	BS 3692 Gr. 8
		Securing studs	Steel BS 4439 Gr. 8.8
			DN15 to DN32 M10 x 95 mm
			DN40 and DN50 M12 x 95 mm
8	Pilot diaphragms		Phosphor bronze	BS 2870 PB102 1980
9	Pilot valve chamber		SG iron	EN JS 1025

DP27, DP27E, DP27G, DP27GY, DP27R & DP27Y Pilot Operated Pressure Reducing Valves with SG Iron Bodies

*Note: Items 10, 12, 13 and 14 are shown on the exploded view, as they are hidden by the pilot filter on the main illustration.

No.	Part	Material
10*	Pilot valve plunger	Stainless steel	BS 970 321 S 31
11	Pilot valve seat with integral seal	Stainless steel + PTFE	BS 970 431 S 29
12*	Pilot valve ball	Stainless steel	AISI 420
13*	Pilot valve spring	Stainless steel	BS 2057 302 S 26
14*	Pilot valve clip	Stainless steel	BS EN 10088-2 1995 1.4310