Graco Inc 233757 important safety instructions Mechanical Back Pressure Regulators

Parts

Mechanical Back Pressure Regulators

Part Nos. 233758, 233811, 233950, 234255, 234261, and 234262

	28
1	25				15
	24				14
	5	10			2
					3	6
	22				4
	21				1
	13		12
	19				10	5
3	17
	16	6	2	11	4
4			7	8
	23		6	9
					TI11249a

1Torque to 4-5 N•m (35-44 in-lb).

2Torque to 2 N•m (18 in-lb).

3Torque to 5 N•m (44 in-lb).

4Grease OD.

5Used only on non-npt models 233758, 233950, and 233811.

6Not used on models 233811 and 234255.

7Models 233811 and 234255 use a plug and retaining ring (not shown).

Ref.				Ref.
				No.	Part No.	Description	Qty
No.	Part No.	Description	Qty
				11	117101	PLUG, threaded, not used on mod-	2
1		HOUSING, lower, for 233758 and	1
						els 233811 and 234255
		233950
				12	117085	SEAL, ring	1
		HOUSING, lower for 234262 and	1
				13	117099	PLUG, threaded	1
		234261
				14	245373	PLUNGER, valve, for 233758,	1
	15A198	HOUSING, lower, for 233811	1
						233950, 234261, and 234262
	15C303	HOUSING, lower, for 234255	1
					245378	PLUNGER, valve, for 233811 and	1
2	245369	SEAT, valve, for 233758, 233950,	1
						234255
		234261, and 234262
				15	15A179	DIAPHRAGM	1
	15A228	SEAT, valve, for 233811 and	1
				16	15A172	CAP, spring	1
		234255
				17	117122	NUT, seal-lock	1
3	15Y036	O-RING, not used on models	1
				19	117087	SPRING, compression, for 233758	1
		233811 and 234255
						and 234262
4	15Y035	O-RING, for 233758, 233950,	2
					117095	SPRING, compression, for 233811,	1
		234261, and 234262
						233950, 234261, and 234255
	15Y031	O-RING, for 233811 and 234255	2
				21	15A177	PLATE, spring, top	1
8	15A143	COVER, for 233758, 233950,	1
				22	117105	BALL, 6 mm	1
		234261, and 234262
				23	15A185	PACKING, PTFE with carbon	1
	15A222	PLUG, for 233811 and 234255	1
				24	245365	HOUSING, upper	1
9	117123	SCREW, fhms, M4x10, not used on	2
				25	117126	SCREW, shcs, M5x16	8
		models 233811 and 234255
				28	15A241	SCREW, custom	1
10	15A219	RING, for non-npt models 233758,	2
				29	117124	RING, retaining, 233811 and	1
		and 233950
						234255 only
	15A221	RING, for non-npt model 233811	2

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